diff --git a/litellm-rust/crates/python-bridge/src/redis/store/spend_counters.rs b/litellm-rust/crates/python-bridge/src/redis/store/spend_counters.rs
index 58b77222f5e..dd5f6fea90a 100644
--- a/litellm-rust/crates/python-bridge/src/redis/store/spend_counters.rs
+++ b/litellm-rust/crates/python-bridge/src/redis/store/spend_counters.rs
@@ -100,77 +100,57 @@ impl NativeSpendCounters {
         Some(pending("async_batch_get_cache", kind_error, read, numbers))
     }
 
+    #[pyo3(signature = (counter, amount, ttl_seconds = None))]
     fn increment<'py>(
         &self,
         py: Python<'py>,
         counter: PyData<SpendCounter>,
         amount: PyNumber,
+        ttl_seconds: Option<f64>,
     ) -> PyResult<Bound<'py, PyAny>> {
         let store = self.0.clone();
+        let ttl = ttl(ttl_seconds)?;
         redis_async(py, "async_increment", kind_error, async move {
-            store.increment(&counter.0, amount.0).await.map(PyNumber)
+            store
+                .increment(&counter.0, amount.0, ttl)
+                .await
+                .map(PyNumber)
         })
     }
 
+    #[pyo3(signature = (increments, ttl_seconds = None))]
     fn increment_many<'py>(
         &self,
         py: Python<'py>,
         increments: Vec<(PyData<SpendCounter>, PyNumber)>,
+        ttl_seconds: Option<f64>,
     ) -> PyResult<Bound<'py, PyAny>> {
         let store = self.0.clone();
         let increments = self::increments(increments);
+        let ttl = ttl(ttl_seconds)?;
         redis_async(py, "async_increment_pipeline", kind_error, async move {
-            let totals = store.increment_many(&increments).await?;
+            let totals = store.increment_many(&increments, ttl).await?;
             Ok(totals.into_iter().map(PyNumber).collect::<Vec<_>>())
         })
     }
 
     /// Declares the increments on the request's post-call batch; `False` when there is no Redis.
+    #[pyo3(signature = (request, increments, ttl_seconds = None))]
     fn increment_many_post_call(
         &self,
         request: &NativeRequestRedis,
         increments: Vec<(PyData<SpendCounter>, PyNumber)>,
-    ) -> bool {
-        self.0
-            .increment_many_post_call(&request.0, &self::increments(increments))
-    }
-
-    fn set_max<'py>(
-        &self,
-        py: Python<'py>,
-        counter: PyData<SpendCounter>,
-        spend: PyNumber,
-    ) -> PyResult<Bound<'py, PyAny>> {
-        let store = self.0.clone();
-        redis_async(py, "async_set_max", kind_error, async move {
-            store
-                .set_max(&counter.0, spend.0)
-                .await
-                .map(|stored| stored.map(PyNumber))
-        })
-    }
-
-    #[pyo3(signature = (counter, spend, *, increment_if_lost))]
-    fn seed<'py>(
-        &self,
-        py: Python<'py>,
-        counter: PyData<SpendCounter>,
-        spend: PyNumber,
-        increment_if_lost: bool,
-    ) -> PyResult<Bound<'py, PyAny>> {
-        let store = self.0.clone();
-        let lost = if increment_if_lost {
-            LostSeed::Increment
-        } else {
-            LostSeed::Answer
-        };
-        redis_async(py, "async_set_cache", kind_error, async move {
-            store.seed(&counter.0, spend.0, lost).await.map(PyNumber)
-        })
+        ttl_seconds: Option<f64>,
+    ) -> PyResult<bool> {
+        Ok(self.0.increment_many_post_call(
+            &request.0,
+            &self::increments(increments),
+            ttl(ttl_seconds)?,
+        ))
     }
 
     #[pyo3(signature = (counter, spend, ttl_seconds = None))]
-    fn set<'py>(
+    fn set_max<'py>(
         &self,
         py: Python<'py>,
         counter: PyData<SpendCounter>,
@@ -179,8 +159,52 @@ impl NativeSpendCounters {
     ) -> PyResult<Bound<'py, PyAny>> {
         let store = self.0.clone();
         let ttl = ttl(ttl_seconds)?;
+        redis_async(py, "async_set_max", kind_error, async move {
+            store
+                .set_max(&counter.0, spend.0, ttl)
+                .await
+                .map(|stored| stored.map(PyNumber))
+        })
+    }
+
+    #[pyo3(signature = (counter, spend, *, increment_if_lost, ttl_seconds = None))]
+    fn seed<'py>(
+        &self,
+        py: Python<'py>,
+        counter: PyData<SpendCounter>,
+        spend: PyNumber,
+        increment_if_lost: bool,
+        ttl_seconds: Option<f64>,
+    ) -> PyResult<Bound<'py, PyAny>> {
+        let store = self.0.clone();
+        let ttl = ttl(ttl_seconds)?;
+        let lost = if increment_if_lost {
+            LostSeed::Increment
+        } else {
+            LostSeed::Answer
+        };
         redis_async(py, "async_set_cache", kind_error, async move {
-            store.set(&counter.0, spend.0, ttl).await
+            store
+                .seed(&counter.0, spend.0, lost, ttl)
+                .await
+                .map(PyNumber)
+        })
+    }
+
+    #[pyo3(signature = (counter, spend, memory_ttl_seconds = None, redis_ttl_seconds = None))]
+    fn set<'py>(
+        &self,
+        py: Python<'py>,
+        counter: PyData<SpendCounter>,
+        spend: PyNumber,
+        memory_ttl_seconds: Option<f64>,
+        redis_ttl_seconds: Option<f64>,
+    ) -> PyResult<Bound<'py, PyAny>> {
+        let store = self.0.clone();
+        let memory_ttl = ttl(memory_ttl_seconds)?;
+        let redis_ttl = ttl(redis_ttl_seconds)?;
+        redis_async(py, "async_set_cache", kind_error, async move {
+            store.set(&counter.0, spend.0, memory_ttl, redis_ttl).await
         })
     }
 
@@ -196,14 +220,17 @@ impl NativeSpendCounters {
         })
     }
 
+    #[pyo3(signature = (counter, ttl_seconds = None))]
     fn refresh_ttl<'py>(
         &self,
         py: Python<'py>,
         counter: PyData<SpendCounter>,
+        ttl_seconds: Option<f64>,
     ) -> PyResult<Bound<'py, PyAny>> {
         let store = self.0.clone();
+        let ttl = ttl(ttl_seconds)?;
         redis_async(py, "async_refresh_ttl", kind_error, async move {
-            store.refresh_ttl(&counter.0).await
+            store.refresh_ttl(&counter.0, ttl).await
         })
     }
 
diff --git a/litellm-rust/crates/redis-client/src/client.rs b/litellm-rust/crates/redis-client/src/client.rs
index 3cf468e0d3f..f3674a43b1c 100644
--- a/litellm-rust/crates/redis-client/src/client.rs
+++ b/litellm-rust/crates/redis-client/src/client.rs
@@ -164,7 +164,7 @@ impl RedisClient {
         Pipeline::new(self.0.namespace.clone())
     }
 
-    pub(crate) fn namespace(&self) -> &Namespace {
+    pub fn namespace(&self) -> &Namespace {
         &self.0.namespace
     }
 
diff --git a/litellm-rust/crates/redis-client/src/namespace.rs b/litellm-rust/crates/redis-client/src/namespace.rs
index 4db02b5b7bb..07cbf305332 100644
--- a/litellm-rust/crates/redis-client/src/namespace.rs
+++ b/litellm-rust/crates/redis-client/src/namespace.rs
@@ -11,7 +11,7 @@ impl Namespace {
         self.0.as_deref()
     }
 
-    pub(crate) fn apply(&self, key: &str) -> String {
+    pub fn apply(&self, key: &str) -> String {
         match &self.0 {
             Some(namespace) if !is_prefixed(key, namespace) => {
                 format!("{namespace}:{key}")
diff --git a/litellm-rust/crates/redis-store/src/spend_counters/keys.rs b/litellm-rust/crates/redis-store/src/spend_counters/keys.rs
index 061e19ed1de..7d04ead3dfb 100644
--- a/litellm-rust/crates/redis-store/src/spend_counters/keys.rs
+++ b/litellm-rust/crates/redis-store/src/spend_counters/keys.rs
@@ -1,3 +1,5 @@
+use litellm_redis_client::Namespace;
+
 /// One budget's spend counter. `parse` and `key` round-trip `main`'s `spend:*` keys exactly.
 #[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub enum SpendCounter {
@@ -48,6 +50,12 @@ impl SpendCounter {
         }
     }
 
+    /// `RedisCache.reset_fence_key`: hash-tagged with the namespaced key, so a cluster keeps the
+    /// fence and the counter on one slot.
+    pub(super) fn reset_fence_key(&self, namespace: &Namespace) -> String {
+        format!("{{{}}}:reset_fence", namespace.apply(&self.key()))
+    }
+
     pub fn parse(key: &str) -> Result<Self, NotASpendCounter> {
         let invalid = || NotASpendCounter(key.to_owned());
         let rest = key.strip_prefix("spend:").ok_or_else(invalid)?;
@@ -83,3 +91,27 @@ impl SpendCounter {
         })
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use litellm_redis_client::Namespace;
+    use rstest::rstest;
+
+    use super::SpendCounter;
+
+    /// Mirrored by `tests/unit/redis/stores/test_spend_counters.py`, against `RedisCache.reset_fence_key`.
+    #[rstest]
+    #[case::no_namespace(Namespace::default(), "{spend:team:t}:reset_fence")]
+    #[case::namespaced(Namespace::new("litellm"), "{litellm:spend:team:t}:reset_fence")]
+    fn the_reset_fence_is_tagged_with_the_namespaced_counter(
+        #[case] namespace: Namespace,
+        #[case] fence: &str,
+    ) {
+        let counter = SpendCounter::Team {
+            team_id: "t".to_owned(),
+            window: None,
+        };
+
+        assert_eq!(counter.reset_fence_key(&namespace), fence);
+    }
+}
diff --git a/litellm-rust/crates/redis-store/src/spend_counters/mod.rs b/litellm-rust/crates/redis-store/src/spend_counters/mod.rs
index 98f619cc501..31750e04a78 100644
--- a/litellm-rust/crates/redis-store/src/spend_counters/mod.rs
+++ b/litellm-rust/crates/redis-store/src/spend_counters/mod.rs
@@ -16,8 +16,9 @@ use crate::{
 };
 
 /// `RedisCache.async_set_max`, byte for byte, sent as `EVAL` like it: a counter only ever rises to
-/// the authoritative spend.
+/// the authoritative spend, and a reset's fence holds a repair still carrying the pre-reset total.
 const SET_MAX: &str = concat!(
+    "if KEYS[2] ~= nil and redis.call('EXISTS', KEYS[2]) == 1 then return redis.call('GET', KEYS[1]) end ",
     "local cur = redis.call('GET', KEYS[1]) ",
     "if cur == false or tonumber(cur) < tonumber(ARGV[1]) then ",
     "redis.call('SET', KEYS[1], ARGV[1]) ",
@@ -57,7 +58,7 @@ impl SpendCounters {
         self.cache.redis().get().is_some()
     }
 
-    /// The TTL every Redis write gives a counter, `None` without Redis.
+    /// The TTL of a Redis write whose caller names none, `None` without Redis.
     pub fn redis_ttl(&self) -> Option<Duration> {
         self.cache.redis().get().map(|remote| remote.default_ttl)
     }
@@ -119,7 +120,12 @@ impl SpendCounters {
     /// `increment_spend_counter_cache`: `INCRBYFLOAT` refreshing the TTL, mirrored into memory. A
     /// failed increment may or may not have landed, so the counter is dropped everywhere before the
     /// error returns. Without Redis it is a memory increment.
-    pub async fn increment(&self, counter: &SpendCounter, amount: Number) -> Result<Number, Error> {
+    pub async fn increment(
+        &self,
+        counter: &SpendCounter,
+        amount: Number,
+        ttl: Option<Duration>,
+    ) -> Result<Number, Error> {
         let Some(remote) = self.cache.redis().get() else {
             return self.increment_local(counter, amount);
         };
@@ -127,7 +133,7 @@ impl SpendCounters {
         let increment = commands::incr_by_float(
             &key,
             amount.into(),
-            Some(Expiry::Refresh(remote.default_ttl)),
+            Some(Expiry::Refresh(ttl.unwrap_or(remote.default_ttl))),
         );
         match remote.client.send(increment).await {
             Ok(total) => {
@@ -147,6 +153,7 @@ impl SpendCounters {
     pub async fn increment_many(
         &self,
         increments: &[(SpendCounter, Number)],
+        ttl: Option<Duration>,
     ) -> Result<Vec<Number>, Error> {
         let Some(remote) = self.cache.redis().get() else {
             return increments
@@ -154,12 +161,13 @@ impl SpendCounters {
                 .map(|(counter, amount)| self.increment_local(counter, *amount))
                 .collect();
         };
+        let ttl = ttl.unwrap_or(remote.default_ttl);
         let pipeline = RedisBatch::pipelined(remote.client.clone());
         let totals = increments.iter().map(|(counter, amount)| {
             pipeline.add(commands::incr_by_float(
                 &counter.key(),
                 (*amount).into(),
-                Some(Expiry::Refresh(remote.default_ttl)),
+                Some(Expiry::Refresh(ttl)),
             ))
         });
         let totals = Declared::all(totals.collect::<Vec<_>>()).await;
@@ -180,10 +188,12 @@ impl SpendCounters {
         self: &Arc<Self>,
         request: &RequestRedis,
         increments: &[(SpendCounter, Number)],
+        ttl: Option<Duration>,
     ) -> bool {
         let Some(remote) = self.cache.redis().get() else {
             return false;
         };
+        let ttl = ttl.unwrap_or(remote.default_ttl);
         let batch = Send::PostCall(request).batch(&remote.client);
         let declared = increments
             .iter()
@@ -191,7 +201,7 @@ impl SpendCounters {
                 let total = batch.add(commands::incr_by_float(
                     &counter.key(),
                     (*amount).into(),
-                    Some(Expiry::KeepExisting(remote.default_ttl)),
+                    Some(Expiry::KeepExisting(ttl)),
                 ));
                 (counter.clone(), total)
             })
@@ -220,11 +230,12 @@ impl SpendCounters {
     }
 
     /// `_repair_stale_spend_counter`: raise memory and Redis to `spend`, never lowering either.
-    /// `None` without Redis, else what Redis holds afterwards.
+    /// `None` without Redis, else what Redis holds afterwards, a reset's fence holding the write.
     pub async fn set_max(
         &self,
         counter: &SpendCounter,
         spend: Number,
+        ttl: Option<Duration>,
     ) -> Result<Option<Number>, Error> {
         let key = counter.key();
         {
@@ -243,11 +254,12 @@ impl SpendCounters {
         };
         let args = (
             to_str(&spend.to_value()),
-            remote.default_ttl.as_secs().to_string(),
+            ttl.unwrap_or(remote.default_ttl).as_secs().to_string(),
         );
+        let fence = counter.reset_fence_key(remote.client.namespace());
         let stored: Option<f64> = remote
             .client
-            .send(commands::eval_source(SET_MAX, &[&key], args))
+            .send(commands::eval_source(SET_MAX, &[&key, &fence], args))
             .await?;
         Ok(stored.map(Number::Float))
     }
@@ -260,6 +272,7 @@ impl SpendCounters {
         counter: &SpendCounter,
         spend: Number,
         lost: LostSeed,
+        ttl: Option<Duration>,
     ) -> Result<Number, Error> {
         let key = counter.key();
         let Some(Remote {
@@ -276,8 +289,9 @@ impl SpendCounters {
                 })
             })?);
         };
+        let ttl = ttl.unwrap_or(*default_ttl);
         let current = if client
-            .send(commands::set_nx(&key, spend.to_json(), *default_ttl))
+            .send(commands::set_nx(&key, spend.to_json(), ttl))
             .await?
         {
             spend
@@ -290,7 +304,7 @@ impl SpendCounters {
                         let increment = commands::incr_by_float(
                             &key,
                             spend.into(),
-                            Some(Expiry::KeepExisting(*default_ttl)),
+                            Some(Expiry::KeepExisting(ttl)),
                         );
                         Number::Float(client.send(increment).await?)
                     }
@@ -301,19 +315,20 @@ impl SpendCounters {
         Ok(current)
     }
 
-    /// A spend reset: memory, then Redis, each for `ttl` or its own default.
+    /// A spend reset: memory, then Redis, each for its own TTL or its own default.
     pub async fn set(
         &self,
         counter: &SpendCounter,
         spend: Number,
-        ttl: Option<Duration>,
+        memory_ttl: Option<Duration>,
+        redis_ttl: Option<Duration>,
     ) -> Result<(), Error> {
         let key = counter.key();
-        self.cache.memory().set(&key, spend, ttl)?;
+        self.cache.memory().set(&key, spend, memory_ttl)?;
         let Some(remote) = self.cache.redis().get() else {
             return Ok(());
         };
-        let ttl = ttl.unwrap_or(remote.default_ttl);
+        let ttl = redis_ttl.unwrap_or(remote.default_ttl);
         remote
             .client
             .send(commands::set(&key, spend.to_json(), ttl))
@@ -328,13 +343,20 @@ impl SpendCounters {
     }
 
     /// `refresh_spend_counter_ttl`: `false` without Redis or for a counter Redis no longer holds.
-    pub async fn refresh_ttl(&self, counter: &SpendCounter) -> Result<bool, Error> {
+    pub async fn refresh_ttl(
+        &self,
+        counter: &SpendCounter,
+        ttl: Option<Duration>,
+    ) -> Result<bool, Error> {
         let Some(remote) = self.cache.redis().get() else {
             return Ok(false);
         };
         Ok(remote
             .client
-            .send(commands::expire(&counter.key(), remote.default_ttl))
+            .send(commands::expire(
+                &counter.key(),
+                ttl.unwrap_or(remote.default_ttl),
+            ))
             .await?)
     }
 
diff --git a/litellm-rust/crates/redis-store/tests/spend_counters.rs b/litellm-rust/crates/redis-store/tests/spend_counters.rs
index 75b7af2c321..1519b231303 100644
--- a/litellm-rust/crates/redis-store/tests/spend_counters.rs
+++ b/litellm-rust/crates/redis-store/tests/spend_counters.rs
@@ -12,7 +12,7 @@ use litellm_redis_store::{
 };
 use litellm_redis_testing::{RedisDeployment, Topology};
 use rstest::rstest;
-use support::{COOLDOWN_POLICY, connect, connect_observed, remote, within};
+use support::{COOLDOWN_POLICY, connect, connect_namespaced, connect_observed, remote, within};
 use tokio::runtime::Handle;
 
 const TTL: Duration = Duration::from_secs(60);
@@ -181,7 +181,7 @@ async fn resets_and_repairs_write_mains_bytes_with_the_redis_ttl(
     let counter = team("t");
 
     for (spend, bytes) in SETS {
-        store.set(&counter, spend, None).await.unwrap();
+        store.set(&counter, spend, None, None).await.unwrap();
         assert_eq!(
             raw.send(commands::get::<String>(&counter.key()))
                 .await
@@ -191,7 +191,7 @@ async fn resets_and_repairs_write_mains_bytes_with_the_redis_ttl(
     }
     for (spend, bytes) in SET_MAXES {
         raw.send(commands::del(&[&counter.key()])).await.unwrap();
-        let repaired = store.set_max(&counter, spend).await.unwrap();
+        let repaired = store.set_max(&counter, spend, None).await.unwrap();
         assert_eq!(
             raw.send(commands::get::<String>(&counter.key()))
                 .await
@@ -201,7 +201,12 @@ async fn resets_and_repairs_write_mains_bytes_with_the_redis_ttl(
         assert_eq!(repaired, Some(Number::Float(spend.as_f64())));
     }
     store
-        .set(&counter, Number::Int(5), Some(Duration::from_secs(30)))
+        .set(
+            &counter,
+            Number::Int(5),
+            None,
+            Some(Duration::from_secs(30)),
+        )
         .await
         .unwrap();
     let Ttl::Expires(remaining) = raw.send(commands::ttl(&counter.key())).await.unwrap() else {
@@ -222,10 +227,19 @@ async fn set_max_only_ever_raises_a_counter(
         token: "hashed".to_owned(),
         window: None,
     };
-    store.increment(&counter, Number::Float(9.5)).await.unwrap();
+    store
+        .increment(&counter, Number::Float(9.5), None)
+        .await
+        .unwrap();
 
-    let lower = store.set_max(&counter, Number::Float(4.0)).await.unwrap();
-    let higher = store.set_max(&counter, Number::Float(12.0)).await.unwrap();
+    let lower = store
+        .set_max(&counter, Number::Float(4.0), None)
+        .await
+        .unwrap();
+    let higher = store
+        .set_max(&counter, Number::Float(12.0), None)
+        .await
+        .unwrap();
 
     assert_eq!(lower, Some(Number::Float(9.5)));
     assert_eq!(higher, Some(Number::Float(12.0)));
@@ -245,6 +259,150 @@ async fn set_max_only_ever_raises_a_counter(
     );
 }
 
+/// Mirrored by `tests/unit/redis/stores/test_spend_counters.py`, which checks the same fence keys
+/// against `RedisCache`, the writer of the fence.
+#[rstest]
+#[tokio::test]
+async fn a_reset_fence_holds_a_repair_until_it_is_gone(
+    #[values(Topology::Standalone, Topology::Cluster)] topology: Topology,
+    #[values(
+        (None, "spend:team:t", "{spend:team:t}:reset_fence"),
+        (Some("litellm"), "litellm:spend:team:t", "litellm:{litellm:spend:team:t}:reset_fence"),
+    )]
+    wire: (Option<&str>, &str, &str),
+) {
+    let (namespace, stored_as, fence) = wire;
+    let deployment = RedisDeployment::start(topology).await.unwrap();
+    let raw = connect(&deployment);
+    let client = match namespace {
+        Some(namespace) => connect_namespaced(&deployment, namespace),
+        None => connect(&deployment),
+    };
+    let store = store(Some(client));
+    let counter = team("t");
+    store
+        .set(&counter, Number::Float(0.0), None, None)
+        .await
+        .unwrap();
+    raw.send(commands::set(fence, "1", TTL)).await.unwrap();
+
+    let held = store
+        .set_max(&counter, Number::Float(12.0), None)
+        .await
+        .unwrap();
+
+    assert_eq!(held, Some(Number::Float(0.0)));
+    assert_eq!(
+        raw.send(commands::get::<String>(stored_as)).await.unwrap(),
+        Some("0.0".to_owned())
+    );
+
+    raw.send(commands::del(&[fence])).await.unwrap();
+    let repaired = store
+        .set_max(&counter, Number::Float(12.0), None)
+        .await
+        .unwrap();
+
+    assert_eq!(repaired, Some(Number::Float(12.0)));
+}
+
+#[derive(Debug, Clone, Copy)]
+enum Write {
+    Increment,
+    IncrementMany,
+    PostCall,
+    SetMax,
+    Seed,
+    Set,
+    RefreshTtl,
+}
+
+#[rstest]
+#[case::increment(Write::Increment)]
+#[case::increment_many(Write::IncrementMany)]
+#[case::post_call(Write::PostCall)]
+#[case::set_max(Write::SetMax)]
+#[case::seed(Write::Seed)]
+#[case::set(Write::Set)]
+#[case::refresh_ttl(Write::RefreshTtl)]
+#[tokio::test]
+async fn every_write_lasts_for_the_ttl_its_caller_names(
+    #[case] write: Write,
+    #[values(Topology::Standalone, Topology::Cluster)] topology: Topology,
+) {
+    let deployment = RedisDeployment::start(topology).await.unwrap();
+    let raw = connect(&deployment);
+    let store = store(Some(connect(&deployment)));
+    let counter = team("t");
+    let long = Some(Duration::from_secs(3600));
+    let one = Number::Int(1);
+
+    match write {
+        Write::Increment => {
+            store.increment(&counter, one, long).await.unwrap();
+        }
+        Write::IncrementMany => {
+            store
+                .increment_many(&[(counter.clone(), one)], long)
+                .await
+                .unwrap();
+        }
+        Write::PostCall => {
+            let request = RequestRedis::new(Handle::current(), LONG_DEADLINE);
+            assert!(store.increment_many_post_call(&request, &[(counter.clone(), one)], long));
+            request.flush_post().await;
+            litellm_redis_testing::eventually(async || store.get_local(&counter).unwrap()).await;
+        }
+        Write::SetMax => {
+            store.set_max(&counter, one, long).await.unwrap();
+        }
+        Write::Seed => {
+            store
+                .seed(&counter, one, LostSeed::Answer, long)
+                .await
+                .unwrap();
+        }
+        Write::Set => {
+            store.set(&counter, one, None, long).await.unwrap();
+        }
+        Write::RefreshTtl => {
+            store.increment(&counter, one, None).await.unwrap();
+            assert!(store.refresh_ttl(&counter, long).await.unwrap());
+        }
+    }
+
+    let Ttl::Expires(remaining) = raw.send(commands::ttl(&counter.key())).await.unwrap() else {
+        panic!("{write:?} left the counter without a TTL");
+    };
+    assert!(within(remaining, 3600), "{write:?} {remaining:?}");
+}
+
+#[rstest]
+#[tokio::test]
+async fn a_reset_gives_memory_and_redis_their_own_ttl() {
+    let deployment = RedisDeployment::start(Topology::Standalone).await.unwrap();
+    let raw = connect(&deployment);
+    let store = store(Some(connect(&deployment)));
+    let counter = team("t");
+
+    store
+        .set(
+            &counter,
+            Number::Int(5),
+            Some(Duration::from_millis(1)),
+            Some(Duration::from_secs(3600)),
+        )
+        .await
+        .unwrap();
+    tokio::time::sleep(Duration::from_millis(20)).await;
+
+    assert_eq!(store.get_local(&counter).unwrap(), None);
+    let Ttl::Expires(remaining) = raw.send(commands::ttl(&counter.key())).await.unwrap() else {
+        panic!("a reset counter has no TTL");
+    };
+    assert!(within(remaining, 3600), "{remaining:?}");
+}
+
 #[rstest]
 #[tokio::test]
 async fn increments_refresh_the_ttl_and_mirror_the_shared_total_into_memory(
@@ -257,7 +415,7 @@ async fn increments_refresh_the_ttl_and_mirror_the_shared_total_into_memory(
     let store = store(Some(client));
     let [first, second] = [team("a"), team("b")];
     other_pod
-        .increment(&first, Number::Float(1.25))
+        .increment(&first, Number::Float(1.25), None)
         .await
         .unwrap();
     raw.send(commands::expire(&first.key(), Duration::from_secs(5)))
@@ -265,10 +423,13 @@ async fn increments_refresh_the_ttl_and_mirror_the_shared_total_into_memory(
         .unwrap();
 
     let totals = store
-        .increment_many(&[
-            (first.clone(), Number::Float(0.5)),
-            (second.clone(), Number::Int(2)),
-        ])
+        .increment_many(
+            &[
+                (first.clone(), Number::Float(0.5)),
+                (second.clone(), Number::Int(2)),
+            ],
+            None,
+        )
         .await
         .unwrap();
 
@@ -301,7 +462,7 @@ async fn a_post_call_increment_from_a_thread_without_a_runtime_lands_in_redis_an
 
     let declared = std::thread::spawn({
         let (store, request, counter) = (Arc::clone(&store), request.clone(), counter.clone());
-        move || store.increment_many_post_call(&request, &[(counter, Number::Float(3.5))])
+        move || store.increment_many_post_call(&request, &[(counter, Number::Float(3.5))], None)
     })
     .join()
     .expect("a Python thread has no Tokio context, and declaring there must not panic");
@@ -331,7 +492,11 @@ async fn post_call_increments_wait_for_the_post_batch_then_land_in_memory(
     let request = RequestRedis::new(Handle::current(), LONG_DEADLINE);
     let counter = team("t");
 
-    assert!(store.increment_many_post_call(&request, &[(counter.clone(), Number::Float(3.5))]));
+    assert!(store.increment_many_post_call(
+        &request,
+        &[(counter.clone(), Number::Float(3.5))],
+        None
+    ));
     request.flush_pre().await;
 
     assert!(trips.seen().is_empty());
@@ -417,11 +582,11 @@ async fn a_seed_lets_the_first_pod_win_and_others_answer_with_its_value(
     let counter = SpendCounter::Org("org".to_owned());
 
     let won = first
-        .seed(&counter, Number::Float(10.0), LostSeed::Answer)
+        .seed(&counter, Number::Float(10.0), LostSeed::Answer, None)
         .await
         .unwrap();
     let lost = second
-        .seed(&counter, Number::Float(99.0), LostSeed::Increment)
+        .seed(&counter, Number::Float(99.0), LostSeed::Increment, None)
         .await
         .unwrap();
 
@@ -452,13 +617,16 @@ async fn delete_drops_memory_and_redis_and_refresh_ttl_reports_whether_redis_hel
     let store = store(Some(connect(&deployment)));
     let counters = [team("a"), team("b")];
     for counter in &counters {
-        store.increment(counter, Number::Int(1)).await.unwrap();
+        store
+            .increment(counter, Number::Int(1), None)
+            .await
+            .unwrap();
     }
     raw.send(commands::expire(&counters[0].key(), Duration::from_secs(5)))
         .await
         .unwrap();
 
-    assert!(store.refresh_ttl(&counters[0]).await.unwrap());
+    assert!(store.refresh_ttl(&counters[0], None).await.unwrap());
     let Ttl::Expires(remaining) = raw.send(commands::ttl(&counters[0].key())).await.unwrap() else {
         panic!("a refreshed counter has no TTL");
     };
@@ -475,7 +643,7 @@ async fn delete_drops_memory_and_redis_and_refresh_ttl_reports_whether_redis_hel
         );
         assert_eq!(store.get_local(counter).unwrap(), None);
     }
-    assert!(!store.refresh_ttl(&counters[0]).await.unwrap());
+    assert!(!store.refresh_ttl(&counters[0], None).await.unwrap());
 }
 
 // main's read_spend_counter_cache_value: RedisCache.async_get_cache swallows a failed GET and
@@ -487,12 +655,18 @@ async fn a_failed_read_serves_the_local_counter_and_a_failed_increment_drops_the
     let deployment = RedisDeployment::start(Topology::Standalone).await.unwrap();
     let store = store(Some(connect(&deployment)));
     let [kept, failed] = [team("kept"), team("failed")];
-    store.increment(&kept, Number::Float(2.0)).await.unwrap();
-    store.increment(&failed, Number::Float(3.0)).await.unwrap();
+    store
+        .increment(&kept, Number::Float(2.0), None)
+        .await
+        .unwrap();
+    store
+        .increment(&failed, Number::Float(3.0), None)
+        .await
+        .unwrap();
     deployment.stop().await.unwrap();
 
     let read = store.read(&kept).await.unwrap();
-    let increment = store.increment(&failed, Number::Float(1.0)).await;
+    let increment = store.increment(&failed, Number::Float(1.0), None).await;
 
     assert_eq!(read, Reading::Memory(Some(Number::Float(2.0))));
     assert!(increment.is_err());
@@ -521,7 +695,10 @@ async fn a_read_with_an_open_breaker_serves_the_local_counter() {
     );
     let store = store(Some(support::connect_guarded(&deployment, breaker)));
     let counter = team("t");
-    store.increment(&counter, Number::Float(2.0)).await.unwrap();
+    store
+        .increment(&counter, Number::Float(2.0), None)
+        .await
+        .unwrap();
     deployment.stop().await.unwrap();
 
     let failed = store.read(&counter).await.unwrap();
@@ -556,8 +733,15 @@ async fn a_failed_post_call_increment_drops_the_counter_from_memory() {
     let store = store(Some(connect(&deployment)));
     let request = RequestRedis::new(Handle::current(), LONG_DEADLINE);
     let counter = team("t");
-    store.increment(&counter, Number::Float(1.0)).await.unwrap();
-    assert!(store.increment_many_post_call(&request, &[(counter.clone(), Number::Float(1.0))]));
+    store
+        .increment(&counter, Number::Float(1.0), None)
+        .await
+        .unwrap();
+    assert!(store.increment_many_post_call(
+        &request,
+        &[(counter.clone(), Number::Float(1.0))],
+        None
+    ));
     deployment.stop().await.unwrap();
 
     request.flush_post().await;
@@ -573,17 +757,23 @@ async fn without_redis_counters_live_in_memory() {
     let request = RequestRedis::new(Handle::current(), LONG_DEADLINE);
 
     let totals = store
-        .increment_many(&[
-            (counter.clone(), Number::Int(2)),
-            (counter.clone(), Number::Float(0.5)),
-        ])
+        .increment_many(
+            &[
+                (counter.clone(), Number::Int(2)),
+                (counter.clone(), Number::Float(0.5)),
+            ],
+            None,
+        )
         .await
         .unwrap();
     let seeded = store
-        .seed(&counter, Number::Float(1.0), LostSeed::Answer)
+        .seed(&counter, Number::Float(1.0), LostSeed::Answer, None)
+        .await
+        .unwrap();
+    let raised = store
+        .set_max(&counter, Number::Float(7.0), None)
         .await
         .unwrap();
-    let raised = store.set_max(&counter, Number::Float(7.0)).await.unwrap();
 
     assert_eq!(totals, [Number::Int(2), Number::Float(2.5)]);
     assert_eq!(seeded, Number::Float(2.5));
@@ -592,7 +782,7 @@ async fn without_redis_counters_live_in_memory() {
         store.read(&counter).await.unwrap(),
         Reading::Memory(Some(Number::Float(7.0)))
     );
-    assert!(!store.increment_many_post_call(&request, &[(counter.clone(), Number::Int(1))]));
+    assert!(!store.increment_many_post_call(&request, &[(counter.clone(), Number::Int(1))], None));
     assert!(
         store
             .read_many(RedisSend::PreCall(&request), &[counter])
@@ -616,7 +806,7 @@ async fn spend_counters_send_the_commands_main_sends(
         .unwrap();
 
     store
-        .increment(&counters[0], Number::Float(1.5))
+        .increment(&counters[0], Number::Float(1.5), None)
         .await
         .unwrap();
     store
@@ -626,11 +816,11 @@ async fn spend_counters_send_the_commands_main_sends(
         .unwrap()
         .unwrap();
     store
-        .set_max(&counters[0], Number::Float(9.0))
+        .set_max(&counters[0], Number::Float(9.0), None)
         .await
         .unwrap();
     store
-        .seed(&counters[1], Number::Float(2.0), LostSeed::Answer)
+        .seed(&counters[1], Number::Float(2.0), LostSeed::Answer, None)
         .await
         .unwrap();
     store.delete(&counters).await.unwrap();
diff --git a/litellm-rust/crates/redis-store/tests/support/mod.rs b/litellm-rust/crates/redis-store/tests/support/mod.rs
index f4b05c304e3..b323569c0bb 100644
--- a/litellm-rust/crates/redis-store/tests/support/mod.rs
+++ b/litellm-rust/crates/redis-store/tests/support/mod.rs
@@ -35,6 +35,10 @@ pub fn connect(deployment: &RedisDeployment) -> RedisClient {
     connect_with(deployment, None, None)
 }
 
+pub fn connect_namespaced(deployment: &RedisDeployment, namespace: &str) -> RedisClient {
+    build(deployment, Namespace::new(namespace), None, None)
+}
+
 /// `client` with `RedisCache`'s default TTL when `litellm.default_redis_ttl` is unset.
 pub fn remote(client: RedisClient) -> Remote {
     Remote {
@@ -101,6 +105,15 @@ fn connect_with(
     deployment: &RedisDeployment,
     breaker: Option<litellm_circuit_breaker::Breaker>,
     events: Option<Arc<dyn RedisEvents>>,
+) -> RedisClient {
+    build(deployment, Namespace::default(), breaker, events)
+}
+
+fn build(
+    deployment: &RedisDeployment,
+    namespace: Namespace,
+    breaker: Option<litellm_circuit_breaker::Breaker>,
+    events: Option<Arc<dyn RedisEvents>>,
 ) -> RedisClient {
     let endpoint = match deployment {
         RedisDeployment::Standalone(server) => Target::Url(RedisUrl {
@@ -124,7 +137,7 @@ fn connect_with(
     RedisClient::new(RedisConfig {
         target: endpoint,
         credentials: Credentials::NONE,
-        namespace: Namespace::default(),
+        namespace,
         timeouts: Timeouts::new(Duration::from_millis(500), None),
         breaker,
         events,
diff --git a/litellm/caching/redis_cache.py b/litellm/caching/redis_cache.py
index 4d9d26fc70c..c3b79ad858e 100644
--- a/litellm/caching/redis_cache.py
+++ b/litellm/caching/redis_cache.py
@@ -20,7 +20,7 @@ import threading
 import time
 import weakref
 from collections import Counter
-from collections.abc import Awaitable, Callable, Iterator, Mapping, Sequence
+from collections.abc import AsyncIterator, Awaitable, Callable, Iterable, Iterator, Mapping, Sequence
 from contextvars import ContextVar
 from dataclasses import dataclass
 from datetime import timedelta
@@ -485,6 +485,14 @@ def _record_swallowed_redis_failure(breaker: RedisCircuitBreaker, exc: BaseExcep
     _swallowed_redis_failures.set(_swallowed_redis_failures.get() + 1)
 
 
+async def _first_keys(scan: AsyncIterator[object], count: int | None) -> AsyncIterator[str]:
+    taken: Final = itertools.count(1)
+    async for key in scan:
+        yield key.decode() if isinstance(key, bytes) else str(key)
+        if count is not None and next(taken) >= count:
+            return
+
+
 _LIVE_BREAKERS: Final[weakref.WeakSet[RedisCircuitBreaker]] = weakref.WeakSet()
 
 
@@ -1025,10 +1033,9 @@ class RedisCache(BaseCache):
         return _decoded_counts(await self._async_run_redis_mget_operation(keys=namespaced_keys))
 
     @_redis_circuit_breaker_guard
-    async def async_scan_iter(self, pattern: str, count: int = 100) -> list:
+    async def async_scan_iter(self, pattern: str, count: int = 100, *, unbounded: bool = False) -> list[str]:
         start_time: Final = time.time()
         try:
-            keys: Final = []
             _redis_client: Final = self.init_async_client()
             if not hasattr(_redis_client, "scan_iter"):
                 verbose_logger.debug(
@@ -1036,11 +1043,13 @@ class RedisCache(BaseCache):
                 )
                 return []
 
-            pattern = self.check_and_fix_namespace(key=pattern)
-            async for key in _redis_client.scan_iter(match=pattern + "*", count=count):
-                keys.append(key)
-                if len(keys) >= count:
-                    break
+            namespaced_pattern: Final = self.check_and_fix_namespace(key=pattern)
+            keys: Final = [
+                key
+                async for key in _first_keys(
+                    _redis_client.scan_iter(match=namespaced_pattern + "*", count=count), None if unbounded else count
+                )
+            ]
 
             ## LOGGING ##
             end_time = time.time()
@@ -1343,10 +1352,15 @@ class RedisCache(BaseCache):
             _record_swallowed_redis_failure(self._circuit_breaker, e)
 
     @_redis_circuit_breaker_guard
-    async def async_set_cache_pipeline_with_ttls(self, cache_list: Sequence[tuple[str, object, float | None]]) -> None:
-        """One round trip for writes whose TTLs differ; a ``None`` TTL falls back to the default TTL."""
+    async def async_set_cache_pipeline_with_ttls(
+        self, cache_list: Sequence[tuple[str, object, float | None]]
+    ) -> Exception | None:
+        """One round trip for writes whose TTLs differ; a ``None`` TTL falls back to the default TTL.
+
+        Returns the Redis error when the writes were lost, so a caller that must not report
+        success on a lost write can tell. An open circuit breaker still raises."""
         if len(cache_list) == 0:
-            return
+            return None
         commands: Final = tuple(
             (self.check_and_fix_namespace(key=cache_key), json.dumps(cache_value), self.get_ttl(ttl=ttl))
             for cache_key, cache_value, ttl in cache_list
@@ -1357,16 +1371,6 @@ class RedisCache(BaseCache):
                 for cache_key, json_cache_value, ttl in commands:
                     pipe.set(name=cache_key, value=json_cache_value, ex=None if ttl is None else timedelta(seconds=ttl))
                 await pipe.execute()
-            asyncio.create_task(
-                self.service_logger_obj.async_service_success_hook(
-                    service=ServiceTypes.REDIS,
-                    duration=time.time() - start_time,
-                    call_type="async_set_cache_pipeline_with_ttls",
-                    caller=_get_call_stack_info(),
-                    start_time=start_time,
-                    end_time=time.time(),
-                )
-            )
         except Exception as e:
             asyncio.create_task(
                 self.service_logger_obj.async_service_failure_hook(
@@ -1386,6 +1390,19 @@ class RedisCache(BaseCache):
                 e,
             )
             _record_swallowed_redis_failure(self._circuit_breaker, e)
+            return e
+        else:
+            asyncio.create_task(
+                self.service_logger_obj.async_service_success_hook(
+                    service=ServiceTypes.REDIS,
+                    duration=time.time() - start_time,
+                    call_type="async_set_cache_pipeline_with_ttls",
+                    caller=_get_call_stack_info(),
+                    start_time=start_time,
+                    end_time=time.time(),
+                )
+            )
+            return None
 
     async def _set_cache_sadd_helper(
         self,
@@ -1562,12 +1579,18 @@ class RedisCache(BaseCache):
             )
             raise e
 
+    def reset_fence_key(self, key: str) -> str:
+        """Hash-tagged with the namespaced ``key`` so a cluster keeps the fence and the key on one slot."""
+        return f"{{{self.check_and_fix_namespace(key=key)}}}:reset_fence"
+
     @_redis_circuit_breaker_guard
     async def async_set_max(
         self,
         key: str,
         value: float,
         ttl: int | None = None,
+        *,
+        fence_key: str | None = None,
     ) -> float | None:
         """Atomically set ``key`` to ``value`` only when ``value`` is greater
         than the stored value (or the key is unset), refreshing the TTL.
@@ -1577,11 +1600,17 @@ class RedisCache(BaseCache):
         concurrent increment that has already pushed the counter higher. The
         GET/compare/SET runs in a single Lua call, so it is also atomic across
         racing callers and pods. Returns the resulting value.
+
+        While ``fence_key`` exists the write is held and the stored value returned
+        as is: a spend reset sets one (``reset_fence_key``) so a repair still
+        carrying the pre-reset total cannot raise the counter the reset zeroed.
         """
         _redis_client: Final = self.init_async_client()
         _used_ttl: Final = self.get_ttl(ttl=ttl)
         key = self.check_and_fix_namespace(key=key)
+        keys: Final = (key,) if fence_key is None else (key, self.check_and_fix_namespace(key=fence_key))
         lua: Final = (
+            "if KEYS[2] ~= nil and redis.call('EXISTS', KEYS[2]) == 1 then return redis.call('GET', KEYS[1]) end "
             "local cur = redis.call('GET', KEYS[1]) "
             "if cur == false or tonumber(cur) < tonumber(ARGV[1]) then "
             "redis.call('SET', KEYS[1], ARGV[1]) "
@@ -1591,7 +1620,7 @@ class RedisCache(BaseCache):
         )
         result = cast(
             "str | bytes | int | float | None",
-            await _redis_client.eval(lua, 1, key, str(value), str(int(_used_ttl or 0))),
+            await _redis_client.eval(lua, len(keys), *keys, str(value), str(int(_used_ttl or 0))),
         )
         if result is None:
             return None
@@ -1968,11 +1997,10 @@ class RedisCache(BaseCache):
             raise e
 
     @_redis_circuit_breaker_guard
-    async def delete_cache_keys(self, keys):
+    async def delete_cache_keys(self, keys: Iterable[str]) -> None:
         _redis_client: Final = self._async_commands()
-        keys = [self.check_and_fix_namespace(key=key) for key in keys]
-        # keys is a list, unpack it so it gets passed as individual elements to delete
-        await _redis_client.delete(*keys)
+        namespaced_keys: Final = [self.check_and_fix_namespace(key=key) for key in keys]
+        await _redis_client.delete(*namespaced_keys)
 
     def client_list(self) -> list:
         client_list: Final[list] = self.redis_client.client_list()
diff --git a/litellm/constants.py b/litellm/constants.py
index b43f6d9f358..fe1762c5d2b 100644
--- a/litellm/constants.py
+++ b/litellm/constants.py
@@ -1988,6 +1988,7 @@ _background_interaction_cost_polling_env: Final = os.getenv(
 BACKGROUND_INTERACTION_COST_POLLING_ENABLED: Final = _background_interaction_cost_polling_env == "true"
 BACKGROUND_INTERACTION_SETTLEMENT_CLAIM_LEASE_SECONDS: Final = 300.0
 PROXY_BUDGET_RESCHEDULER_MAX_TIME: Final = get_env_int("PROXY_BUDGET_RESCHEDULER_MAX_TIME", 605)
+SPEND_COUNTER_REDIS_TTL_SECONDS: Final = 3600
 PROXY_BATCH_WRITE_AT: Final = get_env_int("PROXY_BATCH_WRITE_AT", 10)  # in seconds, increased from 10
 PROXY_CONFIG_RELOAD_INTERVAL_SECONDS: Final = get_env_int("PROXY_CONFIG_RELOAD_INTERVAL_SECONDS", 30)
 
diff --git a/litellm/proxy/auth/auth_checks.py b/litellm/proxy/auth/auth_checks.py
index b40eb451979..9746957760e 100644
--- a/litellm/proxy/auth/auth_checks.py
+++ b/litellm/proxy/auth/auth_checks.py
@@ -3350,7 +3350,7 @@ async def invalidate_team_member_spend_state(
         spend_db_floor_key: Final = f"spend_db_floor:{spend_counter_key}"
 
         try:
-            await spend_counter_store.set(spend_counter_key, new_spend, ttl=60)
+            await spend_counter_store.set(spend_counter_key, new_spend, memory_ttl=60)
         except Exception as e:  # noqa: BLE001  # fall back to deleting the stale entry before giving up
             verbose_proxy_logger.warning(
                 "Failed to set spend counter %s in Redis after reset: %s; deleting it instead so the next "
diff --git a/litellm/proxy/common_utils/auth_cache_invalidation_pubsub.py b/litellm/proxy/common_utils/auth_cache_invalidation_pubsub.py
index 36650629300..f1917d9ff4a 100644
--- a/litellm/proxy/common_utils/auth_cache_invalidation_pubsub.py
+++ b/litellm/proxy/common_utils/auth_cache_invalidation_pubsub.py
@@ -1,15 +1,13 @@
 import asyncio
 import json
 from collections.abc import Mapping, Sequence
-from dataclasses import asdict, dataclass
-from types import MappingProxyType
+from dataclasses import dataclass
 from typing import TYPE_CHECKING, Final, Protocol
 
-from pydantic import TypeAdapter
+from pydantic import TypeAdapter, ValidationError
 
 from litellm._internal_context import with_service_target
 from litellm._logging import verbose_proxy_logger
-from litellm.litellm_core_utils.core_helpers import as_str_mapping
 from litellm.proxy.common_utils.config_sync_pubsub import (  # noqa: F401  # legacy module exports
     ConfigSyncPubSub,
     _ConfigSyncPubSub,  # pyright: ignore[reportPrivateUsage,reportUnusedImport]  # backwards-compatible package export
@@ -36,12 +34,14 @@ AUTH_CACHE_INVALIDATION_CHANNEL: Final = "litellm_proxy.auth_cache_invalidation"
 _POLL_TIMEOUT_SECONDS: Final = 1.0
 _MAX_PENDING_PUBLISHES: Final = 1024
 _MAX_IN_FLIGHT_PUBLISHES: Final = 16
+_KEYS_PER_MESSAGE: Final = 500
+_MESSAGE_CACHE_KEYS: Final = TypeAdapter(tuple[str, ...])
+_MESSAGE_FIELDS: Final = TypeAdapter(Mapping[str, object])
 _BULK_EVICTION_WAIT_SECONDS: Final = 2.0
 _pending_publishes: Final[set[asyncio.Task[None]]] = set()  # mutable-ok: strong refs keep background publishes alive
 _in_flight_publishes: Final = asyncio.Semaphore(_MAX_IN_FLIGHT_PUBLISHES)
 _BACKOFF_INITIAL_SECONDS: Final = 5.0
 _BACKOFF_MAX_SECONDS: Final = 60.0
-_DECODED_JSON: Final = TypeAdapter(object)
 
 
 def auth_cache_invalidation_channel(redis_cache: "RedisCache") -> str:
@@ -52,16 +52,21 @@ def auth_cache_invalidation_channel(redis_cache: "RedisCache") -> str:
 
 @dataclass(frozen=True, slots=True)
 class _CacheInvalidationMessage:
-    cache_key: str
+    cache_keys: tuple[str, ...]
     new_value: float | None = None
     ttl: float | None = None
 
 
-def _cache_invalidation_message_json(cache_key: str, new_value: float | None = None, ttl: float | None = None) -> str:
-    message: Final[Mapping[str, object]] = MappingProxyType(
-        asdict(_CacheInvalidationMessage(cache_key=cache_key, new_value=new_value, ttl=ttl))
-    )
-    return json.dumps({field: value for field, value in message.items() if value is not None})
+def _cache_invalidation_message_json(
+    cache_keys: Sequence[str], new_value: float | None = None, ttl: float | None = None
+) -> str:
+    fields: Final = {
+        "cache_key": cache_keys[0] if len(cache_keys) == 1 else None,
+        "cache_keys": list(cache_keys) if len(cache_keys) > 1 else None,
+        "new_value": new_value,
+        "ttl": ttl,
+    }
+    return json.dumps({field: value for field, value in fields.items() if value is not None})
 
 
 def _finite_number_or_none(value: object) -> float | None:
@@ -70,22 +75,29 @@ def _finite_number_or_none(value: object) -> float | None:
     return float(value)
 
 
+def _message_cache_keys(single: object, many: object) -> tuple[str, ...]:
+    if isinstance(single, str):
+        return (single,)
+    try:
+        return _MESSAGE_CACHE_KEYS.validate_python(many)
+    except ValidationError:
+        return ()
+
+
 def _message_from_data(data: object) -> _CacheInvalidationMessage | None:
     if isinstance(data, bytes):
         data = data.decode("utf-8", errors="replace")  # rebind-ok: normalizing the wire payload to str
     if not isinstance(data, str):
         return None
     try:
-        parsed: Final = as_str_mapping(_DECODED_JSON.validate_python(json.loads(data)))
-    except json.JSONDecodeError:
+        parsed: Final = _MESSAGE_FIELDS.validate_json(data)
+    except ValidationError:
         return None
-    if parsed is None:
-        return None
-    cache_key: Final = parsed.get("cache_key")
-    if not isinstance(cache_key, str):
+    cache_keys: Final = _message_cache_keys(parsed.get("cache_key"), parsed.get("cache_keys"))
+    if len(cache_keys) == 0:
         return None
     return _CacheInvalidationMessage(
-        cache_key=cache_key,
+        cache_keys=cache_keys,
         new_value=_finite_number_or_none(parsed.get("new_value")),
         ttl=_finite_number_or_none(parsed.get("ttl")),
     )
@@ -106,7 +118,7 @@ async def _publish_batch_to_redis(redis_cache: "RedisCache", cache_keys: tuple[s
         channel: Final = auth_cache_invalidation_channel(redis_cache)
         pipeline: Final = client.pipeline(transaction=False)
         for cache_key in cache_keys:
-            _ = pipeline.publish(channel, _cache_invalidation_message_json(cache_key))
+            _ = pipeline.publish(channel, _cache_invalidation_message_json((cache_key,)))
         async with _in_flight_publishes:
             _ = await pipeline.execute()
     except Exception as e:  # noqa: BLE001  # best-effort publish; mutations must never fail on redis errors
@@ -126,6 +138,19 @@ def _has_room_for_publish(key_count: int) -> bool:
     return False
 
 
+def _queue_publish(
+    redis_cache: "RedisCache", cache_keys: tuple[str, ...], new_value: float | None, ttl: float | None
+) -> None:
+    if not _has_room_for_publish(len(cache_keys)):
+        return
+    task: Final = asyncio.create_task(
+        _publish_to_redis(
+            redis_cache, cache_keys[0], _cache_invalidation_message_json(cache_keys, new_value=new_value, ttl=ttl)
+        )
+    )
+    _pending_publishes.add(task)
+
+
 async def publish_auth_cache_invalidation(
     cache_key: str, new_value: float | None = None, ttl: float | None = None
 ) -> None:
@@ -148,15 +173,17 @@ async def publish_auth_cache_invalidation(
     Redis connection at once; the rest wait in the task set, so a wedge cannot
     drain the shared connection pool.
     """
+    await publish_auth_cache_invalidations(cache_keys=(cache_key,), new_value=new_value, ttl=ttl)
+
+
+async def publish_auth_cache_invalidations(
+    cache_keys: Sequence[str], new_value: float | None = None, ttl: float | None = None
+) -> None:
     redis_cache: Final = coordination_redis_cache()
-    if redis_cache is None or not _has_room_for_publish(1):
+    if redis_cache is None:
         return
-    task: Final = asyncio.create_task(
-        _publish_to_redis(
-            redis_cache, cache_key, _cache_invalidation_message_json(cache_key, new_value=new_value, ttl=ttl)
-        )
-    )
-    _pending_publishes.add(task)
+    for start in range(0, len(cache_keys), _KEYS_PER_MESSAGE):
+        _queue_publish(redis_cache, tuple(cache_keys[start : start + _KEYS_PER_MESSAGE]), new_value, ttl)
     await asyncio.sleep(0)
 
 
@@ -239,18 +266,31 @@ async def evict_and_broadcast(cache_keys: Sequence[str], user_api_key_cache: "Us
 
 
 class AuthCacheInvalidationSubscriber:
-    __slots__ = ("_additional_in_memory_caches", "_redis_cache", "_spend_counters", "_task", "_user_api_key_cache")
+    """``counter_cache`` is the one cache a value-carrying message (a spend reset) is written into;
+    a delete reaches every additional cache. Writing a reset's thousands of counters into every
+    additional cache would evict what the others hold, the BYOK credentials among them."""
+
+    __slots__ = (
+        "_additional_in_memory_caches",
+        "_counter_cache",
+        "_redis_cache",
+        "_spend_counters",
+        "_task",
+        "_user_api_key_cache",
+    )
 
     def __init__(
         self,
         redis_cache: "RedisCache",
         user_api_key_cache: "UserApiKeyCache",
         additional_in_memory_caches: Sequence["InMemoryCache"] = (),
+        counter_cache: "InMemoryCache | None" = None,
         spend_counters: SpendCounterCopies | None = None,
     ) -> None:
         self._redis_cache = redis_cache
         self._user_api_key_cache = user_api_key_cache
         self._additional_in_memory_caches = tuple(additional_in_memory_caches)
+        self._counter_cache = counter_cache
         self._spend_counters: Final = spend_counters
         self._task: asyncio.Task[None] | None = None
 
@@ -307,14 +347,18 @@ class AuthCacheInvalidationSubscriber:
         if parsed is None:
             return
         if self._spend_counters is not None:
-            self._spend_counters.apply_broadcast(parsed.cache_key, parsed.new_value, parsed.ttl)
+            for cache_key in parsed.cache_keys:
+                self._spend_counters.apply_broadcast(cache_key, parsed.new_value, parsed.ttl)
         if parsed.new_value is not None:
-            for additional_cache in self._additional_in_memory_caches:
-                additional_cache.set_cache(parsed.cache_key, parsed.new_value, ttl=parsed.ttl)
+            if self._counter_cache is None:
+                return
+            for cache_key in parsed.cache_keys:
+                self._counter_cache.set_cache(cache_key, parsed.new_value, ttl=parsed.ttl)
             return
-        _drop_from_memory(parsed.cache_key, self._user_api_key_cache)
-        for additional_cache in self._additional_in_memory_caches:
-            additional_cache.delete_cache(parsed.cache_key)
+        for cache_key in parsed.cache_keys:
+            _drop_from_memory(cache_key, self._user_api_key_cache)
+            for additional_cache in self._additional_in_memory_caches:
+                additional_cache.delete_cache(cache_key)
 
     @staticmethod
     async def _close_pubsub(pubsub: ConfigSyncPubSub) -> None:
diff --git a/litellm/proxy/db/spend_counter_reseed.py b/litellm/proxy/db/spend_counter_reseed.py
index 4ed3ac30be7..c8f67b60ebb 100644
--- a/litellm/proxy/db/spend_counter_reseed.py
+++ b/litellm/proxy/db/spend_counter_reseed.py
@@ -132,7 +132,7 @@ class SpendCounterReseed:
         # Per-window key/team counters share prefixes with primary counters
         # but don't correspond to a DB row. Do not reject arbitrary entity IDs
         # or tag names that merely contain ":window:".
-        if SpendCounterReseed._is_key_or_team_window_counter(counter_key):
+        if SpendCounterReseed.is_key_or_team_window_counter(counter_key):
             return None
         try:
             row: Final = await bounded_db_lookup(
@@ -194,7 +194,7 @@ class SpendCounterReseed:
         return float(row.spend or 0.0)
 
     @staticmethod
-    def _is_key_or_team_window_counter(counter_key: str) -> bool:
+    def is_key_or_team_window_counter(counter_key: str) -> bool:
         for prefix in ("spend:key:", "spend:team:"):
             if not counter_key.startswith(prefix):
                 continue
diff --git a/litellm/proxy/management_endpoints/key_management_endpoints.py b/litellm/proxy/management_endpoints/key_management_endpoints.py
index d4a0a35d9eb..e17a160b3a4 100644
--- a/litellm/proxy/management_endpoints/key_management_endpoints.py
+++ b/litellm/proxy/management_endpoints/key_management_endpoints.py
@@ -4270,7 +4270,7 @@ async def update_key_fn(
 
             counter_key: Final = key_counter(hash_token_if_needed(key))
             try:
-                await spend_counter_store.set(counter_key, data.spend, ttl=60)
+                await spend_counter_store.set(counter_key, data.spend, memory_ttl=60)
             except Exception as redis_err:
                 verbose_proxy_logger.warning(
                     "Failed to update spend counter %s in Redis after key spend update: %s. "
diff --git a/litellm/proxy/management_endpoints/organization_endpoints.py b/litellm/proxy/management_endpoints/organization_endpoints.py
index 4e511aee24a..8071cb9dd48 100644
--- a/litellm/proxy/management_endpoints/organization_endpoints.py
+++ b/litellm/proxy/management_endpoints/organization_endpoints.py
@@ -817,6 +817,17 @@ async def update_organization(
         include={"members": True, "teams": True, "litellm_budget_table": True},
     )
 
+    if data.spend is not None:
+        from litellm.proxy.proxy_server import (
+            raise_if_spend_counters_unwritten,
+            set_spend_counters_with_floor_and_broadcast,
+        )
+
+        lost: Final = await set_spend_counters_with_floor_and_broadcast(
+            counter_keys=(f"spend:org:{data.organization_id}",), value=data.spend
+        )
+        raise_if_spend_counters_unwritten(lost, saved="The organization spend was saved")
+
     return response
 
 
diff --git a/litellm/proxy/proxy_server.py b/litellm/proxy/proxy_server.py
index 3297a298af4..e437bce32cf 100644
--- a/litellm/proxy/proxy_server.py
+++ b/litellm/proxy/proxy_server.py
@@ -66,6 +66,7 @@ from pydantic import BaseModel, ConfigDict, Json, JsonValue, TypeAdapter, Valida
 from pydantic.fields import FieldInfo, PydanticUndefined
 from pydantic.main import IncEx
 from pydantic_core import PydanticSerializationError, to_jsonable_python
+from redis.exceptions import RedisError
 from typing_extensions import NotRequired, ReadOnly, TypedDict, assert_never
 
 from litellm._uuid import uuid
@@ -81,6 +82,7 @@ from litellm.constants import (
     BASE_MCP_ROUTE,
     DAILY_TAG_SPEND_BATCH_MULTIPLIER,
     DEFAULT_MAX_RECURSE_DEPTH,
+    DEFAULT_MAX_REDIS_BATCH_CACHE_SIZE,
     DEFAULT_SHARED_HEALTH_CHECK_LOCK_TTL,
     DEFAULT_SHARED_HEALTH_CHECK_TTL,
     DEFAULT_SLACK_ALERTING_THRESHOLD,
@@ -369,6 +371,7 @@ from litellm.constants import (
     REALTIME_SESSION_SUCCESS_LOGGED_KEY,
     ROUTER_SETTINGS_MANAGED_OUTSIDE_CONFIG,
     SPEND_CAPTURE_RATE_CHECK_JOB_ID,
+    SPEND_COUNTER_REDIS_TTL_SECONDS,
     SPEND_LOG_SIZE_CHECK_INTERVAL,
     USER_SPEND_ALERTS_JOB_ID,
     WEEKLY_SPEND_REPORT_JOB_ID,
@@ -520,6 +523,7 @@ from litellm.proxy.common_utils.anthropic_error_payload import (
 from litellm.proxy.common_utils.auth_cache_invalidation_pubsub import (
     AuthCacheInvalidationSubscriber,
     publish_auth_cache_invalidation,
+    publish_auth_cache_invalidations,
 )
 from litellm.proxy.common_utils.callback_utils import initialize_callbacks_on_proxy
 from litellm.proxy.common_utils.codex_catalog_source import codex_catalog_source
@@ -3169,7 +3173,24 @@ user_api_key_cache: UserApiKeyCache = UserApiKeyCache(
     default_in_memory_ttl=UserAPIKeyCacheTTLEnum.in_memory_cache_ttl.value
 )
 spend_counter_cache: Final = DualCache(default_in_memory_ttl=UserAPIKeyCacheTTLEnum.in_memory_cache_ttl.value)
-spend_counter_store: Final = SpendCounterStore(connect(None).spend_counters())
+_SPEND_COUNTER_TTL_BATCH_WRITE_MULTIPLE: Final = 10
+
+
+def spend_counter_redis_ttl() -> int:
+    """Redis TTL for spend counters. A counter that expires before its spend is flushed to the DB reseeds from a
+    stale-low row and re-admits a key that is over budget, so it must outlive many batch-write intervals."""
+    batch_write_at: Final = (
+        proxy_batch_write_at if isinstance(proxy_batch_write_at, (int, float)) else PROXY_BATCH_WRITE_AT
+    )
+    configured_redis_ttl: Final = int(litellm.default_redis_ttl) if litellm.default_redis_ttl is not None else 0
+    return max(
+        SPEND_COUNTER_REDIS_TTL_SECONDS,
+        int(_SPEND_COUNTER_TTL_BATCH_WRITE_MULTIPLE * batch_write_at),
+        configured_redis_ttl,
+    )
+
+
+spend_counter_store: Final = SpendCounterStore(connect(None).spend_counters(), spend_counter_redis_ttl)
 cli_sso_session_cache: Final = DualCache(default_in_memory_ttl=CLI_SSO_SESSION_TTL_SECONDS)
 saml_sso_cache: Final = DualCache(default_in_memory_ttl=SAML_AUTHN_REQUEST_TTL_SECONDS)
 model_max_budget_limiter: Final = PROXY_VirtualKeyModelMaxBudgetLimiter(dual_cache=spend_counter_cache)
@@ -3367,6 +3388,8 @@ async def _drain_spend_event_producer_on_shutdown() -> None:
 # Bounds authoritative DB re-reads when enforcing a budget against a
 # stale-low spend counter: at most one DB read per counter per window.
 SPEND_DB_FLOOR_CACHE_TTL_SECONDS: Final = 5
+SPEND_RESET_FENCE_TTL_SECONDS: Final = 2 * SPEND_DB_FLOOR_CACHE_TTL_SECONDS
+SPEND_DB_FLOOR_MARKER_PREFIX: Final = "spend_db_floor:"
 
 
 def _fail_closed_budget_enforcement() -> bool:
@@ -4436,6 +4459,125 @@ async def invalidate_spend_counter(counter_key: str) -> None:
 
 _invalidate_spend_counter: Final = invalidate_spend_counter
 
+_IN_MEMORY_COUNTER_KEYS: Final = TypeAdapter(tuple[str, ...])
+
+
+_SPEND_COUNTER_STORE_FAILURES: Final = (RedisError, RedisCircuitBreakerOpenError, OSError, ValidationError)
+
+
+def _spend_counter_keys_in_memory(prefix: str) -> frozenset[str]:
+    floor_prefix: Final = f"{SPEND_DB_FLOOR_MARKER_PREFIX}{prefix}"
+    cached_keys: Final = _IN_MEMORY_COUNTER_KEYS.validate_python(tuple(spend_counter_cache.in_memory_cache.cache_dict))
+    counters: Final = (key for key in spend_counter_store.snapshot() if key.startswith(prefix))
+    floors: Final = (
+        key.removeprefix(SPEND_DB_FLOOR_MARKER_PREFIX) for key in cached_keys if key.startswith(floor_prefix)
+    )
+    return frozenset((*counters, *floors))
+
+
+async def _spend_counter_keys_in_redis(redis_cache: RedisCache, prefix: str) -> frozenset[str] | Exception:
+    namespace_prefix: Final = f"{redis_cache.namespace}:" if redis_cache.namespace else ""
+    try:
+        scanned: Final = await redis_cache.async_scan_iter(pattern=prefix, count=500, unbounded=True)
+    except _SPEND_COUNTER_STORE_FAILURES as e:
+        return e
+    return frozenset(key.removeprefix(namespace_prefix) for key in scanned)
+
+
+def _keys_per_reset_pipeline(max_batch_size: int) -> int:
+    return max(1, max_batch_size // 2)
+
+
+_KEYS_PER_RESET_PIPELINE: Final = _keys_per_reset_pipeline(DEFAULT_MAX_REDIS_BATCH_CACHE_SIZE)
+
+
+async def _write_reset_batch(redis_cache: RedisCache, batch: Sequence[str], value: float) -> Exception | None:
+    """The fences go first, so a repair that lands between a fence and its counter already finds the fence. The
+    counters go through ``spend_counter_store``, the client every request increments them with, so a reset reads as
+    written only once that client accepts writes again."""
+    fences: Final = tuple((redis_cache.reset_fence_key(key), 1, SPEND_RESET_FENCE_TTL_SECONDS) for key in batch)
+    try:
+        fenced: Final = await redis_cache.async_set_cache_pipeline_with_ttls(fences)
+    except RedisCircuitBreakerOpenError as e:
+        return e
+    if fenced is not None:
+        return fenced
+    written: Final = await asyncio.gather(
+        *(spend_counter_store.set(key, value, memory_ttl=60) for key in batch), return_exceptions=True
+    )
+    return next((outcome for outcome in written if isinstance(outcome, Exception)), None)
+
+
+async def _write_spend_counters_to_redis(
+    redis_cache: RedisCache, keys: Sequence[str], value: float
+) -> Exception | None:
+    for start in range(0, len(keys), _KEYS_PER_RESET_PIPELINE):
+        if (
+            lost := await _write_reset_batch(redis_cache, keys[start : start + _KEYS_PER_RESET_PIPELINE], value)
+        ) is not None:
+            return lost
+    return None
+
+
+@with_service_target(SPEND_COUNTERS_TARGET)
+async def set_spend_counters_with_floor_and_broadcast(counter_keys: Collection[str], value: float) -> Exception | None:
+    """A spend reset SETs each counter and its spend_db_floor marker on every pod, never
+    deletes them: a pod that cached the pre-reset floor within SPEND_DB_FLOOR_CACHE_TTL_SECONDS
+    would otherwise repair the reseeded counter right back to the old total. The floors are
+    broadcast before the counters so a subscriber never holds the new counter under the old
+    floor, and a reset fence in Redis holds any repair that still races the broadcast.
+
+    Returns the Redis error when the counters could not be written there: this pod and the
+    broadcast still carry the new value, but the other pods fall back to the stale Redis
+    counters once their copies expire, so the caller must not report success."""
+    keys: Final = tuple(sorted(counter_keys))
+    if len(keys) == 0:
+        return None
+    floor_keys: Final = tuple(f"{SPEND_DB_FLOOR_MARKER_PREFIX}{key}" for key in keys)
+    for key, floor_key in zip(keys, floor_keys, strict=True):
+        spend_counter_store.set_local(key, value, 60)
+        spend_counter_cache.in_memory_cache.set_cache(key=floor_key, value=value, ttl=SPEND_DB_FLOOR_CACHE_TTL_SECONDS)
+    redis_cache: Final = spend_counter_cache.redis_cache
+    lost: Final = None if redis_cache is None else await _write_spend_counters_to_redis(redis_cache, keys, value)
+    await publish_auth_cache_invalidations(floor_keys, new_value=value, ttl=SPEND_DB_FLOOR_CACHE_TTL_SECONDS)
+    await publish_auth_cache_invalidations(keys, new_value=value, ttl=60)
+    return lost
+
+
+@with_service_target(SPEND_COUNTERS_TARGET)
+async def reset_spend_counters_with_prefix(prefix: str) -> Exception | None:
+    """Resets every counter under ``prefix`` this pod or Redis knows; returns the Redis error
+    when the counters there could not be listed or written, with this pod already reset."""
+    redis_cache: Final = spend_counter_cache.redis_cache
+    in_redis: Final[frozenset[str] | Exception] = (
+        frozenset() if redis_cache is None else await _spend_counter_keys_in_redis(redis_cache, prefix)
+    )
+    listed: Final[frozenset[str]] = frozenset() if isinstance(in_redis, Exception) else in_redis
+    counters: Final = frozenset(
+        key
+        for key in _spend_counter_keys_in_memory(prefix) | listed
+        if not SpendCounterReseed.is_key_or_team_window_counter(key)
+    )
+    lost: Final = await set_spend_counters_with_floor_and_broadcast(counters, value=0.0)
+    return in_redis if isinstance(in_redis, Exception) else lost
+
+
+def raise_if_spend_counters_unwritten(lost: Exception | None, saved: str) -> None:
+    """Maps a lost Redis counter write to the public error: the database write stands, so the
+    caller retries the same request once Redis accepts writes rather than undoing anything."""
+    if lost is None:
+        return
+    raise ProxyException(
+        message=(
+            f"{saved}, but the cached spend counters could not be reset in Redis ({lost}). Budget checks on other "
+            "instances keep the previous spend until those counters expire, so retry this request once Redis "
+            "accepts writes."
+        ),
+        type=ProxyErrorTypes.internal_server_error,
+        param=None,
+        code=status.HTTP_500_INTERNAL_SERVER_ERROR,
+    )
+
 
 @with_service_target(SPEND_COUNTERS_TARGET)
 async def set_spend_counter_with_floor_and_broadcast(counter_key: str, value: float) -> None:
@@ -4452,7 +4594,7 @@ async def set_spend_counter_with_floor_and_broadcast(counter_key: str, value: fl
     or floor marker keeps enforcing against it until its own TTL expires.
     """
     try:
-        await spend_counter_store.set(counter_key, value, ttl=60)
+        await spend_counter_store.set(counter_key, value, memory_ttl=60)
     except Exception as redis_err:
         verbose_proxy_logger.warning(
             "Failed to update spend counter %s in Redis: %s. Budget checks may use stale value until counter expires.",
@@ -9048,6 +9190,7 @@ class ProxyConfig:
             redis_cache=redis_cache,
             user_api_key_cache=user_api_key_cache,
             additional_in_memory_caches=(spend_counter_cache.in_memory_cache, byok_credential_cache),
+            counter_cache=spend_counter_cache.in_memory_cache,
             spend_counters=spend_counter_store,
         )
         self.auth_cache_invalidation_subscriber = subscriber
diff --git a/litellm/proxy/spend_tracking/spend_management_endpoints.py b/litellm/proxy/spend_tracking/spend_management_endpoints.py
index 0348d8e1f82..585844dd7d5 100644
--- a/litellm/proxy/spend_tracking/spend_management_endpoints.py
+++ b/litellm/proxy/spend_tracking/spend_management_endpoints.py
@@ -3611,7 +3611,11 @@ async def global_spend_reset():
     3. LiteLLM_TeamTable spend will be set = 0
 
     """
-    from litellm.proxy.proxy_server import prisma_client
+    from litellm.proxy.proxy_server import (
+        prisma_client,
+        raise_if_spend_counters_unwritten,
+        reset_spend_counters_with_prefix,
+    )
 
     if prisma_client is None:
         raise ProxyException(
@@ -3626,6 +3630,9 @@ async def global_spend_reset():
         _ = await transaction.litellm_teamtable.update_many(data={"spend": 0.0}, where={})
         _ = await transaction.query_raw(_LOCK_ALL_KEYS_SQL)
         _ = await transaction.litellm_verificationtoken.update_many(data={"spend": 0.0}, where={})
+    keys_lost: Final = await reset_spend_counters_with_prefix(prefix="spend:key:")
+    teams_lost: Final = await reset_spend_counters_with_prefix(prefix="spend:team:")
+    raise_if_spend_counters_unwritten(keys_lost if keys_lost is not None else teams_lost, saved="Spend was reset")
 
     return {
         "message": "Spend for all API Keys and Teams reset successfully",
diff --git a/litellm/redis/stores/spend_counters/__init__.py b/litellm/redis/stores/spend_counters/__init__.py
index 3ad06589f53..5d6923e365a 100644
--- a/litellm/redis/stores/spend_counters/__init__.py
+++ b/litellm/redis/stores/spend_counters/__init__.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 
-from collections.abc import Awaitable, Mapping, Sequence
+from collections.abc import Awaitable, Callable, Mapping, Sequence
 from functools import partial
 from types import MappingProxyType
 from typing import TYPE_CHECKING, Final
@@ -62,10 +62,16 @@ def _by_counter(counters: Sequence[str], read: Sequence[float | None] | None) ->
 
 class SpendCounterStore:
     """The ``spend:*`` budget counters: Redis shared by every worker, and this worker's memory copy that answers
-    only when Redis cannot. Counters are named by the builders in ``types``."""
+    only when Redis cannot. Counters are named by the builders in ``types``. ``counter_ttl`` gives each Redis write
+    its TTL when it happens, since the settings it depends on load after the store is built; without it a write gets
+    the Redis client's default."""
 
-    def __init__(self, handle: SpendCountersHandle) -> None:
+    def __init__(self, handle: SpendCountersHandle, counter_ttl: Callable[[], float] | None = None) -> None:
         self._handle: Final = handle
+        self._counter_ttl: Final = counter_ttl
+
+    def _write_ttl(self) -> float | None:
+        return None if self._counter_ttl is None else self._counter_ttl()
 
     def attach_redis(self, redis: RedisStores) -> None:
         """Adds the Redis tier once, keeping the memory copies, as ``DualCache.attach_redis_cache`` does."""
@@ -74,7 +80,8 @@ class SpendCounterStore:
 
     @property
     def redis_ttl(self) -> float | None:
-        """The TTL every Redis write gives a counter, None when there is no Redis."""
+        """The Redis client's default TTL, None when there is no Redis. A write whose store has ``counter_ttl`` lasts
+        longer than this."""
         return self._handle.redis_ttl_seconds
 
     @property
@@ -97,11 +104,11 @@ class SpendCounterStore:
     @with_service_target(SPEND_COUNTERS_TARGET)
     async def increment(self, counter: str, amount: float) -> float:
         """Raises when the increment may not have landed, after dropping the counter everywhere."""
-        return await self._handle.increment(counter, amount)
+        return await self._handle.increment(counter, amount, self._write_ttl())
 
     @with_service_target(SPEND_COUNTERS_TARGET)
     async def increment_many(self, increments: Sequence[SpendIncrement]) -> tuple[float, ...]:
-        return tuple(await self._handle.increment_many(increments))
+        return tuple(await self._handle.increment_many(increments, self._write_ttl()))
 
     @with_service_target(SPEND_COUNTERS_TARGET)
     def increment_many_post_call(self, increments: Sequence[SpendIncrement]) -> bool:
@@ -110,22 +117,25 @@ class SpendCounterStore:
         request: Final = post_call_request() if self.has_redis and increments else None
         if request is None:
             return False
-        return self._handle.increment_many_post_call(request, increments)
+        return self._handle.increment_many_post_call(request, increments, self._write_ttl())
 
     @with_service_target(SPEND_COUNTERS_TARGET)
     async def set_max(self, counter: str, spend: float) -> float | None:
-        """Raise memory and Redis to ``spend``, never lowering either; what Redis holds after, None without Redis."""
-        return await self._handle.set_max(counter, spend)
+        """Raise memory and Redis to ``spend``, never lowering either; what Redis holds after, None without Redis. A
+        spend reset's fence (``RedisCache.reset_fence_key``) holds the Redis write while it exists."""
+        return await self._handle.set_max(counter, spend, self._write_ttl())
 
     @with_service_target(SPEND_COUNTERS_TARGET)
     async def seed(self, counter: str, spend: float, *, increment_if_lost: bool) -> float:
         """Seed a cold counter with SET NX so one worker wins, answering with what the counter then holds."""
-        return await self._handle.seed(counter, spend, increment_if_lost=increment_if_lost)
+        return await self._handle.seed(
+            counter, spend, increment_if_lost=increment_if_lost, ttl_seconds=self._write_ttl()
+        )
 
     @with_service_target(SPEND_COUNTERS_TARGET)
-    async def set(self, counter: str, spend: float, ttl: float | None = None) -> None:
-        """Memory, then Redis; raises when Redis failed, with memory already written."""
-        await self._handle.set(counter, spend, ttl)
+    async def set(self, counter: str, spend: float, memory_ttl: float | None = None) -> None:
+        """Memory for ``memory_ttl``, then Redis; raises when Redis failed, with memory already written."""
+        await self._handle.set(counter, spend, memory_ttl, self._write_ttl())
 
     @with_service_target(SPEND_COUNTERS_TARGET)
     async def delete(self, counters: Sequence[str]) -> None:
@@ -134,7 +144,7 @@ class SpendCounterStore:
 
     @with_service_target(SPEND_COUNTERS_TARGET)
     async def refresh_ttl(self, counter: str) -> bool:
-        return await self._handle.refresh_ttl(counter)
+        return await self._handle.refresh_ttl(counter, self._write_ttl())
 
     def get_local(self, counter: str) -> float | None:
         return self._handle.get_local(counter)
diff --git a/litellm/redis/stores/spend_counters/handle.py b/litellm/redis/stores/spend_counters/handle.py
index e4bd789c341..79eb550bcf8 100644
--- a/litellm/redis/stores/spend_counters/handle.py
+++ b/litellm/redis/stores/spend_counters/handle.py
@@ -18,14 +18,26 @@ class SpendCountersHandle(Protocol):
     def read_many(
         self, counters: Sequence[str], send: NativeSend
     ) -> NativePending[Sequence[float | None] | None] | None: ...
-    def increment(self, counter: str, amount: float) -> Awaitable[float]: ...
-    def increment_many(self, increments: Sequence[SpendIncrement]) -> Awaitable[Sequence[float]]: ...
-    def increment_many_post_call(self, request: NativeRequestRedis, increments: Sequence[SpendIncrement]) -> bool: ...
-    def set_max(self, counter: str, spend: float) -> Awaitable[float | None]: ...
-    def seed(self, counter: str, spend: float, *, increment_if_lost: bool) -> Awaitable[float]: ...
-    def set(self, counter: str, spend: float, ttl_seconds: float | None = None) -> Awaitable[None]: ...
+    def increment(self, counter: str, amount: float, ttl_seconds: float | None = None) -> Awaitable[float]: ...
+    def increment_many(
+        self, increments: Sequence[SpendIncrement], ttl_seconds: float | None = None
+    ) -> Awaitable[Sequence[float]]: ...
+    def increment_many_post_call(
+        self, request: NativeRequestRedis, increments: Sequence[SpendIncrement], ttl_seconds: float | None = None
+    ) -> bool: ...
+    def set_max(self, counter: str, spend: float, ttl_seconds: float | None = None) -> Awaitable[float | None]: ...
+    def seed(
+        self, counter: str, spend: float, *, increment_if_lost: bool, ttl_seconds: float | None = None
+    ) -> Awaitable[float]: ...
+    def set(
+        self,
+        counter: str,
+        spend: float,
+        memory_ttl_seconds: float | None = None,
+        redis_ttl_seconds: float | None = None,
+    ) -> Awaitable[None]: ...
     def delete(self, counters: Sequence[str]) -> Awaitable[None]: ...
-    def refresh_ttl(self, counter: str) -> Awaitable[bool]: ...
+    def refresh_ttl(self, counter: str, ttl_seconds: float | None = None) -> Awaitable[bool]: ...
     def get_local(self, counter: str) -> float | None: ...
     def set_local(self, counter: str, spend: float, ttl_seconds: float | None = None) -> None: ...
     def delete_local(self, counter: str) -> None: ...
diff --git a/litellm/rust_bridge/_native.pyi b/litellm/rust_bridge/_native.pyi
index 773985ad427..3155f240d0f 100644
--- a/litellm/rust_bridge/_native.pyi
+++ b/litellm/rust_bridge/_native.pyi
@@ -117,9 +117,7 @@ class NativeRouterUsage:
     def attach(self, client: NativeRedisClient) -> bool: ...
     @property
     def has_redis(self) -> bool: ...
-    def increment(
-        self, counter: _UsageCounter, value: float, ttl_seconds: int
-    ) -> Future[float]: ...
+    def increment(self, counter: _UsageCounter, value: float, ttl_seconds: int) -> Future[float]: ...
     def increment_deployment(
         self,
         deployment_id: str,
@@ -128,12 +126,8 @@ class NativeRouterUsage:
         tokens: float,
         requests: int,
     ) -> Future[None]: ...
-    def get_many(
-        self, counters: Sequence[_UsageCounter]
-    ) -> Future[list[float | None]]: ...
-    def increment_sync(
-        self, counter: _UsageCounter, value: float, ttl_seconds: int
-    ) -> float: ...
+    def get_many(self, counters: Sequence[_UsageCounter]) -> Future[list[float | None]]: ...
+    def increment_sync(self, counter: _UsageCounter, value: float, ttl_seconds: int) -> float: ...
     def increment_deployment_sync(
         self,
         deployment_id: str,
@@ -142,9 +136,7 @@ class NativeRouterUsage:
         tokens: float,
         requests: int,
     ) -> None: ...
-    def get_many_sync(
-        self, counters: Sequence[_UsageCounter]
-    ) -> list[float | None]: ...
+    def get_many_sync(self, counters: Sequence[_UsageCounter]) -> list[float | None]: ...
     def flush_local_counters(self) -> None: ...
     def snapshot(self) -> dict[str, float]: ...
 
@@ -320,7 +312,9 @@ class NativeAuthCache:
     def get_sync(self, key: str) -> object: ...
     def set(self, key: str, value: object, ttl_seconds: float | None = None) -> Future[None]: ...
     def set_sync(self, key: str, value: object, ttl_seconds: float | None = None) -> None: ...
-    def declare_set(self, key: str, value: object, ttl_seconds: float | None, send: NativeSend) -> NativePending[None]: ...
+    def declare_set(
+        self, key: str, value: object, ttl_seconds: float | None, send: NativeSend
+    ) -> NativePending[None]: ...
     def declare_delete(self, key: str, send: NativeSend) -> NativePending[None]: ...
     def set_many(self, entries: Sequence[tuple[str, object]], ttl_seconds: float | None = None) -> Future[None]: ...
     def write_back(self, entries: Sequence[tuple[str, object, float | None]], send: NativeSend) -> Future[None]: ...
@@ -354,16 +348,26 @@ class NativeSpendCounters:
     def read_many(
         self, counters: Sequence[str], send: NativeSend
     ) -> NativePending[list[float | None] | None] | None: ...
-    def increment(self, counter: str, amount: float) -> Future[float]: ...
-    def increment_many(self, increments: Sequence[tuple[str, float]]) -> Future[list[float]]: ...
+    def increment(self, counter: str, amount: float, ttl_seconds: float | None = None) -> Future[float]: ...
+    def increment_many(
+        self, increments: Sequence[tuple[str, float]], ttl_seconds: float | None = None
+    ) -> Future[list[float]]: ...
     def increment_many_post_call(
-        self, request: NativeRequestRedis, increments: Sequence[tuple[str, float]]
+        self, request: NativeRequestRedis, increments: Sequence[tuple[str, float]], ttl_seconds: float | None = None
     ) -> bool: ...
-    def set_max(self, counter: str, spend: float) -> Future[float | None]: ...
-    def seed(self, counter: str, spend: float, *, increment_if_lost: bool) -> Future[float]: ...
-    def set(self, counter: str, spend: float, ttl_seconds: float | None = None) -> Future[None]: ...
+    def set_max(self, counter: str, spend: float, ttl_seconds: float | None = None) -> Future[float | None]: ...
+    def seed(
+        self, counter: str, spend: float, *, increment_if_lost: bool, ttl_seconds: float | None = None
+    ) -> Future[float]: ...
+    def set(
+        self,
+        counter: str,
+        spend: float,
+        memory_ttl_seconds: float | None = None,
+        redis_ttl_seconds: float | None = None,
+    ) -> Future[None]: ...
     def delete(self, counters: Sequence[str]) -> Future[None]: ...
-    def refresh_ttl(self, counter: str) -> Future[bool]: ...
+    def refresh_ttl(self, counter: str, ttl_seconds: float | None = None) -> Future[bool]: ...
     def get_local(self, counter: str) -> float | None: ...
     def set_local(self, counter: str, spend: float, ttl_seconds: float | None = None) -> None: ...
     def delete_local(self, counter: str) -> None: ...
@@ -1056,7 +1060,9 @@ class RouterCoreHandle:
         callbacks: Mapping[str, bool] | None = None,
     ) -> RouterCall[_SuccessReportSteps]: ...
     # Count a success against any id, driven like `report_failure`; `done` carries `key`.
-    def count_success(self, id: str, callbacks: Mapping[str, bool] | None = None) -> RouterCall[_SuccessReportSteps]: ...
+    def count_success(
+        self, id: str, callbacks: Mapping[str, bool] | None = None
+    ) -> RouterCall[_SuccessReportSteps]: ...
     # [(id, tpm_key, rpm_key)] for this minute, or None for a group with no deployment.
     def usage_keys(self, model_group: str) -> list[tuple[str, str, str]] | None: ...
     # Every deployment as a `model_list` entry, in config order.
diff --git a/tests/integration/_support/spend_counters.py b/tests/integration/_support/spend_counters.py
new file mode 100644
index 00000000000..a8c8b738df5
--- /dev/null
+++ b/tests/integration/_support/spend_counters.py
@@ -0,0 +1,33 @@
+import os
+from collections.abc import Iterator
+from contextlib import contextmanager
+from hashlib import sha256
+from typing import Final
+
+from redis import Redis
+
+SPEND_COUNTER_TTL_SECONDS: Final = 3600
+TTL_SLACK_SECONDS: Final = 600
+
+
+@contextmanager
+def rig_cache() -> Iterator[Redis]:
+    with Redis(host=os.environ["REDIS_HOST"], port=int(os.environ["REDIS_PORT"])) as cache:
+        yield cache
+
+
+def key_counter(key: str) -> str:
+    return f"spend:key:{sha256(key.encode()).hexdigest()}"
+
+
+def counter_ttl(cache: Redis, counter_key: str) -> int:
+    return int(str(cache.ttl(counter_key)))
+
+
+def counter_value(cache: Redis, counter_key: str) -> float | None:
+    raw: Final = cache.get(counter_key)
+    return None if raw is None else float(str(raw, "utf-8") if isinstance(raw, bytes) else str(raw))
+
+
+def outlives(ttl: int, expected: int = SPEND_COUNTER_TTL_SECONDS) -> bool:
+    return expected - TTL_SLACK_SECONDS < ttl <= expected
diff --git a/tests/integration/_support/upstream.py b/tests/integration/_support/upstream.py
index 85da60a37ad..16df7c44264 100644
--- a/tests/integration/_support/upstream.py
+++ b/tests/integration/_support/upstream.py
@@ -6,6 +6,7 @@ import base64
 import json
 import os
 import struct
+import time
 import uuid
 import zlib
 from collections import deque
@@ -60,6 +61,46 @@ INTERNAL_FIELDS: Final = frozenset(
 )
 
 
+RESPONSES_USAGE: Final = {"input_tokens": 20, "output_tokens": 20, "total_tokens": 40}
+
+
+def responses_body(model: str) -> dict[str, JsonValue]:
+    return {
+        "id": f"resp_{uuid.uuid4().hex[:24]}",
+        "object": "response",
+        "created_at": int(time.time()),
+        "status": "completed",
+        "model": model,
+        "output": [
+            {
+                "id": f"msg_{uuid.uuid4().hex[:24]}",
+                "type": "message",
+                "role": "assistant",
+                "status": "completed",
+                "content": [{"type": "output_text", "text": "Hello.", "annotations": []}],
+            }
+        ],
+        "usage": dict(RESPONSES_USAGE),
+    }
+
+
+async def responses_stream(completed: Mapping[str, JsonValue]) -> AsyncIterator[str]:
+    item: Final = cast(dict[str, JsonValue], cast(list[JsonValue], completed["output"])[0])
+    events: Final = (
+        ("response.created", {"response": {**completed, "status": "in_progress", "output": [], "usage": None}}),
+        ("response.output_item.added", {"output_index": 0, "item": {**item, "status": "in_progress", "content": []}}),
+        (
+            "response.output_text.delta",
+            {"output_index": 0, "content_index": 0, "item_id": item["id"], "delta": "Hello."},
+        ),
+        ("response.output_item.done", {"output_index": 0, "item": item}),
+        ("response.completed", {"response": dict(completed)}),
+    )
+    for sequence_number, (event_type, payload) in enumerate(events):
+        data: Final = json.dumps({"type": event_type, "sequence_number": sequence_number, **payload})
+        yield f"event: {event_type}\ndata: {data}\n\n"
+
+
 def error_type(status: int) -> str:
     if status == 429:
         return "rate_limit_error"
@@ -222,24 +263,41 @@ class Provider:
             for message in messages
         ):
             return JSONResponse({"error": {"message": "Invalid selected message contract"}}, status_code=400)
-        script: Final = self.scripts.get(str(body["model"]))
-        if script is not None:
-            if not script:
-                return JSONResponse({"error": {"message": "Script exhausted", "type": "api_error"}}, status_code=500)
-            status: Final = script.popleft()
-            if status != 200:
-                return JSONResponse(
-                    {
-                        "error": {
-                            "message": "Controlled provider failure",
-                            "type": error_type(status),
-                            "code": str(status),
-                        }
-                    },
-                    status_code=status,
-                )
+        failure: Final = self._scripted_failure(str(body["model"]))
+        if failure is not None:
+            return failure
         return await chat_completions(request)
 
+    def _scripted_failure(self, model: str) -> Response | None:
+        script: Final = self.scripts.get(model)
+        if script is None:
+            return None
+        if not script:
+            return JSONResponse({"error": {"message": "Script exhausted", "type": "api_error"}}, status_code=500)
+        status: Final = script.popleft()
+        if status == 200:
+            return None
+        return JSONResponse(
+            {"error": {"message": "Controlled provider failure", "type": error_type(status), "code": str(status)}},
+            status_code=status,
+        )
+
+    async def responses(self, request: Request) -> Response:
+        body: Final = JSON_OBJECT.validate_json(await request.body())
+        self.observations.put(
+            Observation(request.url.path, request.headers.get("authorization", ""), body, request.method)
+        )
+        model: Final = body.get("model")
+        if not isinstance(model, str) or "input" not in body:
+            return JSONResponse({"error": {"message": "model and input are required"}}, status_code=400)
+        failure: Final = self._scripted_failure(model)
+        if failure is not None:
+            return failure
+        completed: Final = responses_body(model)
+        if body.get("stream") is True:
+            return StreamingResponse(responses_stream(completed), media_type="text/event-stream")
+        return JSONResponse(completed)
+
     async def vector_store_search(self, request: Request) -> Response:
         body: Final = JSON_OBJECT.validate_json(await request.body())
         self.observations.put(
@@ -645,6 +703,7 @@ class Provider:
                 Route("/_cost_map", self.cost_map, methods=["GET"]),
                 Route("/_oauth/token", self.oauth_token, methods=["POST"]),
                 Route("/v1/chat/completions", self.chat, methods=["POST"]),
+                Route("/v1/responses", self.responses, methods=["POST"]),
                 Route("/v1/completions", completions, methods=["POST"]),
                 Route("/v1/embeddings", embeddings, methods=["POST"]),
                 Route("/v1/moderations", moderations, methods=["POST"]),
diff --git a/tests/integration/caching/test_batch_redis_requests_prefetch.py b/tests/integration/caching/test_batch_redis_requests_prefetch.py
new file mode 100644
index 00000000000..ae61eb354e2
--- /dev/null
+++ b/tests/integration/caching/test_batch_redis_requests_prefetch.py
@@ -0,0 +1,88 @@
+"""The ``batch_redis_requests`` callback prefetches a key's response cache entries
+into memory with one Redis scan, so the next identical request is served without a
+Redis round trip for the entry."""
+
+import os
+import threading
+import uuid
+from collections.abc import Iterator
+from contextlib import contextmanager
+from hashlib import sha256
+from pathlib import Path
+from typing import Final
+
+import httpx
+import pytest
+import yaml
+from integration._support.client import Gateway, eventually, object_value
+from integration._support.process import graceful_stop_seconds, owned_proxy_process
+from integration._support.redis_process import OwnedRedis, owned_redis
+from redis import Redis
+from redis.exceptions import TimeoutError as RedisTimeoutError
+
+ROOT: Final = Path(os.environ.get("INTEGRATION_PROXY_ROOT") or Path(__file__).resolve().parents[3])
+CELL_TIMEOUT: Final = int(2 * graceful_stop_seconds() + 120)
+
+
+def _config_with_batch_redis_requests(directory: Path) -> Path:
+    shared: Final = object_value(yaml.safe_load((ROOT / "tests/integration/proxy_config.yaml").read_text()))
+    litellm_settings: Final = {**object_value(shared["litellm_settings"]), "callbacks": ["batch_redis_requests"]}
+    path: Final = directory / f"proxy_config_{uuid.uuid4().hex}.yaml"
+    path.write_text(yaml.safe_dump({**shared, "litellm_settings": litellm_settings}, sort_keys=False))
+    return path
+
+
+@contextmanager
+def _monitored(redis: OwnedRedis) -> Iterator[list[str]]:
+    commands: Final[list[str]] = []
+    stopped: Final = threading.Event()
+    with Redis(host=redis.host, port=redis.port, socket_timeout=0.3) as client, client.monitor() as monitor:
+
+        def pump() -> None:
+            while not stopped.is_set():
+                try:
+                    commands.append(str(monitor.next_command()["command"]))
+                except RedisTimeoutError:
+                    continue
+
+        thread: Final = threading.Thread(target=pump, daemon=True)
+        thread.start()
+        try:
+            yield commands
+        finally:
+            stopped.set()
+            thread.join(timeout=5)
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_the_prefetched_response_cache_entry_is_served_from_memory_on_the_next_request(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    with owned_redis(tmp_path) as redis:
+        overrides: Final = {"REDIS_HOST": redis.host, "REDIS_PORT": str(redis.port)}
+        with (
+            owned_proxy_process(
+                gateway, tmp_path, overrides, config=_config_with_batch_redis_requests(tmp_path)
+            ) as owned,
+            owned.gateway.scenario() as scenario,
+            Redis(host=redis.host, port=redis.port) as cache,
+            httpx.Client(base_url=gateway.upstream_url, timeout=30) as upstream,
+        ):
+            model: Final = scenario.model()
+            key: Final = scenario.key(models=[model])
+            body: Final = {"model": model, "messages": [{"role": "user", "content": f"prefetch {uuid.uuid4().hex}"}]}
+            namespace: Final = f"litellm:{sha256(key.encode()).hexdigest()}:acompletion"
+            first: Final = owned.gateway.request("POST", "/v1/chat/completions", body, key=key)
+            assert first.status_code == 200, first.text
+            entries: Final = eventually(lambda: cache.keys(f"{namespace}:*"), lambda keys: len(keys) == 1, seconds=10)
+            upstream.delete("/__observations").raise_for_status()
+            with _monitored(redis) as commands:
+                second: Final = owned.gateway.request("POST", "/v1/chat/completions", body, key=key)
+            assert second.status_code == 200, second.text
+            assert second.json()["id"] == first.json()["id"], (first.text, second.text)
+            assert upstream.get("/__observations").json()["requests"] == []
+            fetched: Final = [command for command in commands if command.startswith(f"GET {namespace}:")]
+            assert fetched == [], (entries, commands)
+            third: Final = owned.gateway.request("POST", "/v1/chat/completions", body, key=key)
+            assert third.status_code == 200 and third.json()["id"] == first.json()["id"], third.text
+            assert upstream.get("/__observations").json()["requests"] == []
diff --git a/tests/integration/spend/test_spend_counter_redis_ttl.py b/tests/integration/spend/test_spend_counter_redis_ttl.py
new file mode 100644
index 00000000000..9e763ec366f
--- /dev/null
+++ b/tests/integration/spend/test_spend_counter_redis_ttl.py
@@ -0,0 +1,488 @@
+import asyncio
+import json
+import uuid
+from collections.abc import Callable, Mapping
+from dataclasses import dataclass
+from hashlib import sha256
+from typing import Final
+
+import anthropic
+import httpx
+import openai
+import pytest
+from integration._support.client import Gateway, Scenario, eventually
+from integration._support.database import read_rows
+from integration._support.spend_counters import (
+    counter_ttl,
+    counter_value,
+    key_counter,
+    outlives,
+    rig_cache,
+)
+from pydantic import JsonValue
+from redis import Redis
+
+RATES: Final = {"input_cost_per_token": 0.001, "output_cost_per_token": 0.002}
+ONE_CALL_COST: Final = 0.06
+ANTHROPIC_HEADERS: Final = {"anthropic-version": "2023-06-01"}
+
+
+@dataclass(frozen=True, slots=True)
+class Entities:
+    model: str
+    key: str
+    team: str
+    user: str
+    organization: str
+    end_user: str
+    tag: str
+
+    def counters(self) -> Mapping[str, str]:
+        return {
+            "key": key_counter(self.key),
+            "team": f"spend:team:{self.team}",
+            "team_member": f"spend:team_member:{self.user}:{self.team}",
+            "user": f"spend:user:{self.user}",
+            "end_user": f"spend:end_user:{self.end_user}",
+            "tag": f"spend:tag:{self.tag}",
+            "org": f"spend:org:{self.organization}",
+        }
+
+
+def _entities(gateway: Gateway, scenario: Scenario) -> Entities:
+    model: Final = scenario.model(**RATES)
+    models: Final = [model]
+    organization: Final = scenario.organization(max_budget=50.0)
+    team: Final = scenario.team(models=models, max_budget=20.0, organization_id=organization)
+    user: Final = scenario.user(max_budget=20.0)
+    added: Final = gateway.request(
+        "POST",
+        "/team/member_add",
+        {"team_id": team, "member": {"user_id": user, "role": "user"}, "max_budget_in_team": 20.0},
+    )
+    assert added.status_code == 200, added.text
+    tag: Final = f"integration-tag-{uuid.uuid4().hex}"
+    key: Final = scenario.key(team_id=team, user_id=user, models=models, max_budget=5.0, tags=[tag])
+    end_user: Final = f"integration-end-user-{uuid.uuid4().hex}"
+    return Entities(model, key, team, user, organization, end_user, tag)
+
+
+def _base(gateway: Gateway) -> str:
+    return str(gateway.client.base_url).rstrip("/")
+
+
+def _chat_openai_sync(gateway: Gateway, entities: Entities, text: str) -> str:
+    with openai.OpenAI(base_url=f"{_base(gateway)}/v1", api_key=entities.key, max_retries=0, timeout=60) as client:
+        response: Final = client.chat.completions.create(
+            model=entities.model, messages=[{"role": "user", "content": text}], user=entities.end_user
+        )
+    assert response.usage is not None and response.usage.total_tokens == 40, response
+    return response.id
+
+
+def _chat_openai_async_stream(gateway: Gateway, entities: Entities, text: str) -> str:
+    async def run() -> str:
+        async with openai.AsyncOpenAI(
+            base_url=f"{_base(gateway)}/v1", api_key=entities.key, max_retries=0, timeout=60
+        ) as client:
+            stream: Final = await client.chat.completions.create(
+                model=entities.model,
+                messages=[{"role": "user", "content": text}],
+                user=entities.end_user,
+                stream=True,
+                stream_options={"include_usage": True},
+            )
+            ids: Final = [chunk.id async for chunk in stream]
+        assert len(set(ids)) == 1, ids
+        return ids[0]
+
+    return asyncio.run(run())
+
+
+def _chat_httpx_stream(gateway: Gateway, entities: Entities, text: str) -> str:
+    with gateway.client.stream(
+        "POST",
+        "/v1/chat/completions",
+        json={
+            "model": entities.model,
+            "messages": [{"role": "user", "content": text}],
+            "user": entities.end_user,
+            "stream": True,
+            "stream_options": {"include_usage": True},
+        },
+        headers={"Authorization": f"Bearer {entities.key}"},
+    ) as response:
+        assert response.status_code == 200, response.read()
+        frames: Final = [line.removeprefix("data: ") for line in response.iter_lines() if line.startswith("data: ")]
+    ids: Final = {json.loads(frame)["id"] for frame in frames if frame != "[DONE]"}
+    assert len(ids) == 1, frames
+    return ids.pop()
+
+
+def _messages_anthropic_sync(gateway: Gateway, entities: Entities, text: str) -> str:
+    with anthropic.Anthropic(base_url=_base(gateway), api_key=entities.key, max_retries=0, timeout=60) as client:
+        message: Final = client.messages.create(
+            model=entities.model,
+            max_tokens=32,
+            messages=[{"role": "user", "content": text}],
+            metadata={"user_id": entities.end_user},
+        )
+    assert message.usage.output_tokens > 0, message
+    return message.id
+
+
+def _messages_anthropic_async_stream(gateway: Gateway, entities: Entities, text: str) -> str:
+    async def run() -> str:
+        async with anthropic.AsyncAnthropic(
+            base_url=_base(gateway), api_key=entities.key, max_retries=0, timeout=60
+        ) as client:
+            async with client.messages.stream(
+                model=entities.model,
+                max_tokens=32,
+                messages=[{"role": "user", "content": text}],
+                metadata={"user_id": entities.end_user},
+            ) as stream:
+                async for _ in stream.text_stream:
+                    pass
+                final: Final = await stream.get_final_message()
+        assert final.usage.output_tokens > 0, final
+        return final.id
+
+    return asyncio.run(run())
+
+
+def _messages_httpx(gateway: Gateway, entities: Entities, text: str) -> str:
+    response: Final = gateway.request(
+        "POST",
+        "/v1/messages",
+        {
+            "model": entities.model,
+            "max_tokens": 32,
+            "messages": [{"role": "user", "content": text}],
+            "metadata": {"user_id": entities.end_user},
+        },
+        key=entities.key,
+        headers=ANTHROPIC_HEADERS,
+    )
+    assert response.status_code == 200, response.text
+    return str(response.json()["id"])
+
+
+def _responses_httpx(gateway: Gateway, entities: Entities, text: str) -> str:
+    response: Final = gateway.request(
+        "POST",
+        "/v1/responses",
+        {"model": entities.model, "input": text, "user": entities.end_user},
+        key=entities.key,
+    )
+    assert response.status_code == 200, response.text
+    return str(response.json()["id"])
+
+
+def _responses_httpx_stream(gateway: Gateway, entities: Entities, text: str) -> str:
+    with gateway.client.stream(
+        "POST",
+        "/v1/responses",
+        json={"model": entities.model, "input": text, "user": entities.end_user, "stream": True},
+        headers={"Authorization": f"Bearer {entities.key}"},
+    ) as response:
+        assert response.status_code == 200, response.read()
+        lines: Final = [line for line in response.iter_lines() if line.startswith("data: ")]
+    events: Final = [json.loads(line.removeprefix("data: ")) for line in lines if line != "data: [DONE]"]
+    completed: Final = [event for event in events if event.get("type") == "response.completed"]
+    assert len(completed) == 1, [event.get("type") for event in events]
+    return str(completed[0]["response"]["id"])
+
+
+@dataclass(frozen=True, slots=True)
+class Caller:
+    call: Callable[[Gateway, Entities, str], str]
+    upstream_path: str
+    exact_cost: float | None
+
+
+CALLERS: Final[Mapping[str, Caller]] = {
+    "chat-openai-sync": Caller(_chat_openai_sync, "/v1/chat/completions", ONE_CALL_COST),
+    "chat-openai-async-stream": Caller(_chat_openai_async_stream, "/v1/chat/completions", ONE_CALL_COST),
+    "chat-httpx-stream": Caller(_chat_httpx_stream, "/v1/chat/completions", ONE_CALL_COST),
+    "messages-anthropic-sync": Caller(_messages_anthropic_sync, "/v1/responses", ONE_CALL_COST),
+    "messages-anthropic-async-stream": Caller(_messages_anthropic_async_stream, "/v1/responses", ONE_CALL_COST),
+    "messages-httpx": Caller(_messages_httpx, "/v1/responses", ONE_CALL_COST),
+    "responses-httpx": Caller(_responses_httpx, "/v1/responses", ONE_CALL_COST),
+    "responses-httpx-stream": Caller(_responses_httpx_stream, "/v1/responses", ONE_CALL_COST),
+}
+
+
+def _spend_rows(key: str) -> list[dict[str, JsonValue]]:
+    return read_rows(
+        'SELECT request_id, spend, cache_hit FROM "LiteLLM_SpendLogs" WHERE api_key=%s ORDER BY "startTime"',
+        (sha256(key.encode()).hexdigest(),),
+    )
+
+
+def _one_spend_row(key: str) -> dict[str, JsonValue]:
+    rows: Final = eventually(lambda: _spend_rows(key), lambda values: len(values) == 1, seconds=70)
+    return rows[0]
+
+
+def _observed(cache: Redis, counters: Mapping[str, str]) -> Mapping[str, tuple[float | None, int]]:
+    return {name: (counter_value(cache, counter), counter_ttl(cache, counter)) for name, counter in counters.items()}
+
+
+def _assert_every_counter_outlives(
+    cache: Redis, counters: Mapping[str, str], spend: float
+) -> Mapping[str, tuple[float | None, int]]:
+    observed: Final = eventually(
+        lambda: _observed(cache, counters),
+        lambda states: all(
+            value is not None and value == pytest.approx(spend, abs=1e-9) for value, _ in states.values()
+        ),
+        seconds=20,
+    )
+    for name, (_, ttl) in observed.items():
+        assert outlives(ttl), (name, observed)
+    return observed
+
+
+@pytest.mark.parametrize("caller", sorted(CALLERS))
+def test_every_counter_scope_outlives_the_batch_write(gateway: Gateway, caller: str) -> None:
+    with (
+        gateway.scenario() as scenario,
+        httpx.Client(base_url=gateway.upstream_url, timeout=5, trust_env=False) as upstream,
+        rig_cache() as cache,
+    ):
+        entities: Final = _entities(gateway, scenario)
+        text: Final = f"counter ttl {caller} {uuid.uuid4().hex}"
+        upstream.delete("/__observations").raise_for_status()
+        response_id: Final = CALLERS[caller].call(gateway, entities, text)
+        received: Final = upstream.get("/__observations").json()["requests"]
+        paths: Final = [request["path"] for request in received if text in json.dumps(request["body"])]
+        assert len(paths) == 1 and paths[0].endswith(CALLERS[caller].upstream_path), received
+        row: Final = _one_spend_row(entities.key)
+        spend: Final = float(str(row["spend"]))
+        assert spend == pytest.approx(CALLERS[caller].exact_cost or spend) and spend > 0, row
+        assert response_id, row
+        _assert_every_counter_outlives(cache, entities.counters(), spend)
+
+
+def test_a_response_cache_hit_keeps_the_counter_and_its_ttl(gateway: Gateway) -> None:
+    with (
+        gateway.scenario() as scenario,
+        httpx.Client(base_url=gateway.upstream_url, timeout=5, trust_env=False) as upstream,
+        rig_cache() as cache,
+    ):
+        entities: Final = _entities(gateway, scenario)
+        body: Final = {
+            "model": entities.model,
+            "messages": [{"role": "user", "content": f"cache twin {uuid.uuid4().hex}"}],
+            "user": entities.end_user,
+        }
+        first: Final = gateway.request("POST", "/v1/chat/completions", body, key=entities.key)
+        assert first.status_code == 200, first.text
+        row: Final = _one_spend_row(entities.key)
+        spend: Final = float(str(row["spend"]))
+        before: Final = _assert_every_counter_outlives(cache, entities.counters(), spend)
+        upstream.delete("/__observations").raise_for_status()
+        second: Final = gateway.request("POST", "/v1/chat/completions", body, key=entities.key)
+        assert second.status_code == 200, second.text
+        assert second.json()["id"] == first.json()["id"], (first.text, second.text)
+        assert upstream.get("/__observations").json()["requests"] == []
+        rows: Final = eventually(lambda: _spend_rows(entities.key), lambda values: len(values) == 2, seconds=70)
+        assert str(rows[1]["cache_hit"]) == "True" and float(str(rows[1]["spend"])) == 0.0, rows
+        after: Final = _assert_every_counter_outlives(cache, entities.counters(), spend)
+        assert {name: value for name, (value, _) in after.items()} == pytest.approx(
+            {name: value for name, (value, _) in before.items()}, abs=1e-9
+        ), (before, after)
+
+
+def _exhausted_key(gateway: Gateway, scenario: Scenario) -> tuple[str, str]:
+    model: Final = scenario.model(**RATES)
+    key: Final = scenario.key(models=[model], max_budget=ONE_CALL_COST)
+    served: Final = gateway.chat(model, key=key, text=f"exhaust {uuid.uuid4().hex}")
+    assert served["usage"]["total_tokens"] == 40, served
+    eventually(
+        lambda: read_rows(
+            'SELECT spend FROM "LiteLLM_VerificationToken" WHERE token=%s', (sha256(key.encode()).hexdigest(),)
+        ),
+        lambda rows: len(rows) == 1 and float(str(rows[0]["spend"])) >= ONE_CALL_COST,
+        seconds=70,
+    )
+    return model, key
+
+
+def _chat(gateway: Gateway, model: str, key: str) -> httpx.Response:
+    return gateway.request(
+        "POST",
+        "/v1/chat/completions",
+        {"model": model, "messages": [{"role": "user", "content": f"after {uuid.uuid4().hex}"}]},
+        key=key,
+    )
+
+
+def _assert_denied(response: httpx.Response) -> None:
+    assert response.status_code == 422, response.text
+    assert response.json()["error"]["type"] == "budget_exceeded", response.text
+
+
+def test_a_stale_low_counter_is_repaired_with_the_long_ttl(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(
+            models=[model], budget_limits=[{"max_budget": ONE_CALL_COST, "budget_duration": "1d"}]
+        )
+        counter: Final = f"{key_counter(key)}:window:1d"
+        assert gateway.chat(model, key=key, text=f"exhaust window {uuid.uuid4().hex}")["usage"]["total_tokens"] == 40
+        _one_spend_row(key)
+        assert counter_value(cache, counter) == pytest.approx(ONE_CALL_COST)
+
+        served: Final[list[int]] = []
+
+        def stale_then_request() -> int:
+            assert cache.set(counter, "0.01")
+            code: Final = _chat(gateway, model, key).status_code
+            served.append(code)
+            return code
+
+        assert eventually(stale_then_request, lambda code: code == 422, seconds=30) == 422
+        assert set(served) == {200, 422}, served
+        repaired: Final = (counter_value(cache, counter), counter_ttl(cache, counter))
+        floor: Final = repaired[0]
+        assert floor is not None and ONE_CALL_COST - 1e-9 <= floor <= served.count(200) * ONE_CALL_COST + 1e-9, (
+            repaired,
+            served,
+        )
+        assert outlives(repaired[1]), repaired
+
+
+def test_a_lost_counter_is_reseeded_from_the_db_with_the_long_ttl(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model, key = _exhausted_key(gateway, scenario)
+        counter: Final = key_counter(key)
+        assert cache.delete(counter) == 1
+        _assert_denied(_chat(gateway, model, key))
+        reseeded: Final = eventually(
+            lambda: (counter_value(cache, counter), counter_ttl(cache, counter)),
+            lambda state: state[0] is not None and state[0] >= ONE_CALL_COST and outlives(state[1]),
+            seconds=15,
+        )
+        assert reseeded[0] == pytest.approx(ONE_CALL_COST), reseeded
+
+
+def test_key_update_spend_sets_the_counter_with_the_long_ttl(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=5.0)
+        counter: Final = key_counter(key)
+        assert gateway.chat(model, key=key, text=f"before update {uuid.uuid4().hex}")["usage"]["total_tokens"] == 40
+        _one_spend_row(key)
+        updated: Final = gateway.request("POST", "/key/update", {"key": key, "spend": 1.25})
+        assert updated.status_code == 200, updated.text
+        assert (counter_value(cache, counter), outlives(counter_ttl(cache, counter))) == (1.25, True), updated.text
+        served: Final = _chat(gateway, model, key)
+        assert served.status_code == 200, served.text
+        eventually(
+            lambda: counter_value(cache, counter),
+            lambda value: value is not None and value == pytest.approx(1.25 + ONE_CALL_COST),
+            seconds=15,
+        )
+        assert outlives(counter_ttl(cache, counter))
+
+
+def test_key_reset_spend_sets_the_counter_with_the_long_ttl(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model, key = _exhausted_key(gateway, scenario)
+        counter: Final = key_counter(key)
+        _assert_denied(_chat(gateway, model, key))
+        reset: Final = gateway.request("POST", f"/key/{key}/reset_spend", {"reset_to": 0.0})
+        assert reset.status_code == 200, reset.text
+        assert reset.json()["key_hash"] == sha256(key.encode()).hexdigest(), reset.text
+        assert (counter_value(cache, counter), outlives(counter_ttl(cache, counter))) == (0.0, True), reset.text
+        served: Final = _chat(gateway, model, key)
+        assert served.status_code == 200, served.text
+
+
+def test_team_member_reset_spend_sets_the_counter_with_the_long_ttl(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model: Final = scenario.model(**RATES)
+        team: Final = scenario.team(models=[model])
+        user: Final = scenario.user()
+        added: Final = gateway.request(
+            "POST",
+            "/team/member_add",
+            {"team_id": team, "member": {"user_id": user, "role": "user"}, "max_budget_in_team": ONE_CALL_COST},
+        )
+        assert added.status_code == 200, added.text
+        key: Final = scenario.key(team_id=team, user_id=user, models=[model])
+        counter: Final = f"spend:team_member:{user}:{team}"
+        assert gateway.chat(model, key=key, text=f"member {uuid.uuid4().hex}")["usage"]["total_tokens"] == 40
+        eventually(
+            lambda: read_rows(
+                'SELECT spend FROM "LiteLLM_TeamMembership" WHERE team_id=%s AND user_id=%s', (team, user)
+            ),
+            lambda rows: len(rows) == 1 and float(str(rows[0]["spend"])) >= ONE_CALL_COST,
+            seconds=70,
+        )
+        _assert_denied(_chat(gateway, model, key))
+        reset: Final = gateway.request("POST", f"/team/{team}/member/{user}/reset_spend", {"reset_to": 0.0})
+        assert reset.status_code == 200, reset.text
+        assert reset.json()["previous_spend"] == pytest.approx(ONE_CALL_COST), reset.text
+        assert (counter_value(cache, counter), outlives(counter_ttl(cache, counter))) == (0.0, True), reset.text
+        served: Final = _chat(gateway, model, key)
+        assert served.status_code == 200, served.text
+
+
+def test_malformed_spend_writes_are_rejected_and_leave_the_counter_alone(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=5.0)
+        bystander: Final = scenario.key(models=[model], max_budget=5.0)
+        counter: Final = key_counter(key)
+        assert gateway.chat(model, key=key, text=f"before bad writes {uuid.uuid4().hex}")["usage"]["total_tokens"] == 40
+        _one_spend_row(key)
+        before: Final = (counter_value(cache, counter), counter_ttl(cache, counter))
+        assert before[0] == pytest.approx(ONE_CALL_COST) and outlives(before[1]), before
+        rejected: Final = tuple(
+            gateway.request(*attempt)
+            for attempt in (
+                ("POST", "/key/update", {"key": key, "spend": "a" * 5000}),
+                ("POST", "/key/update", {"key": key, "spend": [1.0]}),
+                ("POST", "/key/update", {"key": key, "spend": {"spend": 1.0}}),
+                ("POST", f"/key/{key}/reset_spend", {"reset_to": "abc"}),
+                ("POST", f"/key/{key}/reset_spend", {"reset_to": True}),
+                ("POST", f"/key/{key}/reset_spend", {"reset_to": [0.0]}),
+                ("POST", f"/key/{key}/reset_spend", {"reset_to": ONE_CALL_COST * 10}),
+            )
+        )
+        for response in rejected:
+            assert response.status_code in (400, 422), response.text
+            assert "error" in response.json() or "detail" in response.json(), response.text
+        assert (counter_value(cache, counter), counter_ttl(cache, counter) <= before[1]) == (before[0], True)
+        assert outlives(counter_ttl(cache, counter))
+        served: Final = _chat(gateway, model, bystander)
+        assert served.status_code == 200, served.text
+
+
+def _landed_chat(gateway: Gateway, model: str, key: str, index: int) -> str:
+    served: Final = gateway.chat(model, key=key, text=f"repeat {index} {uuid.uuid4().hex}")
+    eventually(lambda: _spend_rows(key), lambda rows: len(rows) == index + 1, seconds=70)
+    return str(served["id"])
+
+
+def test_repeated_requests_log_once_each_and_the_counter_matches_their_sum(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=5.0)
+        counter: Final = key_counter(key)
+        ids: Final = tuple(_landed_chat(gateway, model, key, index) for index in range(3))
+        assert len(set(ids)) == 3, ids
+        rows: Final = _spend_rows(key)
+        assert len(rows) == 3, rows
+        assert sorted(str(row["request_id"]) for row in rows) == sorted(ids), rows
+        total: Final = sum(float(str(row["spend"])) for row in rows)
+        assert total == pytest.approx(3 * ONE_CALL_COST), rows
+        eventually(
+            lambda: counter_value(cache, counter),
+            lambda value: value is not None and value == pytest.approx(total),
+            seconds=15,
+        )
+        assert outlives(counter_ttl(cache, counter))
diff --git a/tests/integration/spend/test_spend_counter_reset_fence.py b/tests/integration/spend/test_spend_counter_reset_fence.py
new file mode 100644
index 00000000000..003737f37d9
--- /dev/null
+++ b/tests/integration/spend/test_spend_counter_reset_fence.py
@@ -0,0 +1,46 @@
+"""The reset fence: a spend reset SETs it in the same pipeline as the zeroed counter, and the stale-floor
+repair's Lua script leaves a fenced counter alone, so a pod still holding the pre-reset floor cannot raise
+the counter the reset zeroed for the whole counter TTL."""
+
+import os
+import uuid
+from typing import Final
+
+from integration._support.spend_counters import rig_cache
+
+from litellm.caching.redis_cache import RedisCache
+from litellm.redis.stores.connection import connect
+from litellm.redis.stores.spend_counters import SpendCounterStore
+
+
+async def test_set_max_holds_while_the_reset_fence_exists() -> None:
+    cache: Final = RedisCache(host=os.environ["REDIS_HOST"], port=int(os.environ["REDIS_PORT"]), namespace="fence")
+    counter: Final = f"spend:key:{uuid.uuid4().hex}"
+    fence: Final = cache.reset_fence_key(counter)
+    assert await cache.async_set_cache_pipeline_with_ttls(((fence, 1, 10), (counter, 0.0, 3600))) is None
+
+    assert await cache.async_set_max(key=counter, value=12.0, ttl=3600, fence_key=fence) == 0.0
+
+    with rig_cache() as raw:
+        assert raw.delete(cache.check_and_fix_namespace(key=fence)) == 1
+    assert await cache.async_set_max(key=counter, value=12.0, ttl=3600, fence_key=fence) == 12.0
+    with rig_cache() as raw:
+        raw.delete(cache.check_and_fix_namespace(key=counter))
+
+
+async def test_the_native_repair_holds_while_a_fence_the_python_reset_wrote_exists() -> None:
+    """The reset writes through ``RedisCache`` and the repair through the native store, so they must agree on the key."""
+    cache: Final = RedisCache(host=os.environ["REDIS_HOST"], port=int(os.environ["REDIS_PORT"]), namespace="fence")
+    store: Final = SpendCounterStore(connect(cache).spend_counters(), lambda: 3600)
+    counter: Final = f"spend:key:{uuid.uuid4().hex}"
+    fence: Final = cache.reset_fence_key(counter)
+    assert await cache.async_set_cache_pipeline_with_ttls(((fence, 1, 10), (counter, 0.0, 3600))) is None
+
+    assert await store.set_max(counter, 12.0) == 0.0
+
+    with rig_cache() as raw:
+        assert raw.delete(cache.check_and_fix_namespace(key=fence)) == 1
+    assert await store.set_max(counter, 12.0) == 12.0
+    with rig_cache() as raw:
+        assert raw.ttl(cache.check_and_fix_namespace(key=counter)) > 60
+        raw.delete(cache.check_and_fix_namespace(key=counter))
diff --git a/tests/integration/spend/test_spend_counter_reset_paths.py b/tests/integration/spend/test_spend_counter_reset_paths.py
new file mode 100644
index 00000000000..1f59771c0f5
--- /dev/null
+++ b/tests/integration/spend/test_spend_counter_reset_paths.py
@@ -0,0 +1,667 @@
+"""The two spend reset paths that touch the Redis spend counters.
+
+``POST /global/spend/reset`` zeroes every key and team spend in the database. The
+counters that enforce those budgets must follow it on every pod, or a key the
+operator just reset stays blocked until the counter's TTL runs out. ``PATCH
+/organization/update`` with ``spend`` sets one organization's counter to the given
+value. Both write a reset fence next to each zeroed counter so a pod still holding
+the pre-reset floor cannot repair the counter back up, and both answer 500 when the
+counters could not be written to Redis, so the operator retries once it is back.
+Every cell drives a real proxy: the cells that reset every key or stop Redis boot
+their own proxy on a scratch database and an owned Redis.
+"""
+
+import asyncio
+import os
+import threading
+import uuid
+from collections.abc import Callable, Iterator, Mapping, Sequence
+from contextlib import contextmanager
+from dataclasses import dataclass
+from hashlib import sha256
+from pathlib import Path
+from typing import Final
+
+import httpx
+import pytest
+import yaml
+from integration._support.client import Gateway, Scenario, eventually, object_value
+from integration._support.database import read_rows, scratch_database
+from integration._support.process import graceful_stop_seconds, owned_proxy_process
+from integration._support.redis_process import OwnedRedis, owned_redis
+from integration._support.spend_counters import (
+    SPEND_COUNTER_TTL_SECONDS,
+    counter_ttl,
+    counter_value,
+    key_counter,
+    outlives,
+    rig_cache,
+)
+from pydantic import BaseModel, ConfigDict
+from redis import Redis
+
+from litellm.caching.redis_cache import RedisCache
+
+ROOT: Final = Path(os.environ.get("INTEGRATION_PROXY_ROOT") or Path(__file__).resolve().parents[3])
+RATES: Final = {"input_cost_per_token": 0.001, "output_cost_per_token": 0.002}
+ONE_CALL_COST: Final = 0.06
+INVALIDATION_CHANNEL: Final = "litellm_proxy.auth_cache_invalidation"
+REDIS_AUTH_CACHE_SETTING: Final = frozenset({"enable_redis_auth_cache"})
+REDIS_SETTINGS: Final = frozenset({"cache", "cache_params", *REDIS_AUTH_CACHE_SETTING})
+SEEDED_COUNTERS: Final = 1200
+SETTLE_SECONDS: Final = 20
+BROADCAST_SECONDS: Final = 10
+RACE_WINDOW_SECONDS: Final = 2
+DATABASE_SECONDS: Final = 70
+FENCE_SECONDS: Final = 10
+RECOVERY_SECONDS: Final = 30
+LOST_COUNTERS: Final = "but the cached spend counters could not be reset in Redis"
+RETRY_HINT: Final = "retry this request once Redis accepts writes."
+CELL_TIMEOUT: Final = int(2 * graceful_stop_seconds() + 120)
+
+
+class _BroadcastMessage(BaseModel):
+    model_config = ConfigDict(frozen=True, extra="ignore")
+
+    cache_key: str | None = None
+    cache_keys: tuple[str, ...] = ()
+    new_value: float | None = None
+    ttl: float | None = None
+
+    def names(self) -> tuple[str, ...]:
+        return (self.cache_key,) if self.cache_key is not None else self.cache_keys
+
+
+@dataclass(frozen=True, slots=True)
+class Broadcast:
+    key: str
+    value: float | None
+    ttl: float | None
+
+
+class _Broadcasts:
+    def __init__(self, cache: Redis) -> None:
+        self._pubsub: Final = cache.pubsub()
+        self._pubsub.subscribe(INVALIDATION_CHANNEL)
+        confirmation: Final = self._pubsub.get_message(timeout=5)
+        assert confirmation is not None and confirmation["type"] == "subscribe", confirmation
+        self._condition: Final = threading.Condition()
+        self._received: Final[list[Broadcast]] = []
+        self._stopped: Final = threading.Event()
+        self._thread: Final = threading.Thread(target=self._pump, daemon=True)
+        self._thread.start()
+
+    def _pump(self) -> None:
+        while not self._stopped.is_set():
+            self._record(self._pubsub.get_message(timeout=0.2))
+
+    def _record(self, message: Mapping[str, object] | None) -> None:
+        if message is None or message["type"] != "message":
+            return
+        data: Final = message["data"]
+        assert isinstance(data, bytes | str), message
+        parsed: Final = _BroadcastMessage.model_validate_json(data)
+        with self._condition:
+            self._received.extend(Broadcast(key, parsed.new_value, parsed.ttl) for key in parsed.names())
+            self._condition.notify_all()
+
+    def wait_for(self, satisfied: Callable[[Sequence[Broadcast]], bool], seconds: float) -> bool:
+        with self._condition:
+            return self._condition.wait_for(lambda: satisfied(tuple(self._received)), timeout=seconds)
+
+    def received(self) -> tuple[Broadcast, ...]:
+        with self._condition:
+            return tuple(self._received)
+
+    def close(self) -> None:
+        self._stopped.set()
+        self._thread.join(timeout=5)
+        self._pubsub.close()
+
+
+@contextmanager
+def _broadcasts(cache: Redis) -> Iterator[_Broadcasts]:
+    broadcasts: Final = _Broadcasts(cache)
+    try:
+        yield broadcasts
+    finally:
+        broadcasts.close()
+
+
+def _zeroed(counter: str) -> Callable[[Sequence[Broadcast]], bool]:
+    return lambda received: any(broadcast.key == counter and broadcast.value == 0.0 for broadcast in received)
+
+
+def _zeroed_with_its_floor(counter: str) -> Callable[[Sequence[Broadcast]], bool]:
+    return lambda received: (
+        sum(1 for broadcast in received if broadcast.key.endswith(counter) and broadcast.value == 0.0) >= 2
+    )
+
+
+@dataclass(frozen=True, slots=True)
+class Isolated:
+    gateway: Gateway
+    cache: Redis
+    redis: OwnedRedis
+    database_url: str
+    log: Path
+
+
+def _pod_environment(database_url: str, redis: OwnedRedis) -> Mapping[str, str]:
+    return {
+        "DATABASE_URL": database_url,
+        "REDIS_HOST": redis.host,
+        "REDIS_PORT": str(redis.port),
+        "REDIS_CIRCUIT_BREAKER_RECOVERY_TIMEOUT": "2",
+    }
+
+
+@contextmanager
+def _isolated(
+    gateway: Gateway,
+    directory: Path,
+    *,
+    workers: int = 1,
+    settings: tuple[tuple[str, str], ...] = (),
+    config: Path | None = None,
+) -> Iterator[Isolated]:
+    with scratch_database() as database_url, owned_redis(directory) as redis:
+        overrides: Final[Mapping[str, str]] = {**_pod_environment(database_url, redis), **dict(settings)}
+        with (
+            owned_proxy_process(
+                gateway,
+                directory,
+                overrides,
+                workers=workers,
+                config=config,
+                remove_environment=("DATABASE_URL_READ_REPLICA",),
+            ) as owned,
+            Redis(host=redis.host, port=redis.port) as cache,
+        ):
+            yield Isolated(owned.gateway, cache, redis, database_url, owned.log)
+
+
+@contextmanager
+def _second_pod(gateway: Gateway, directory: Path, isolated: Isolated, config: Path) -> Iterator[Gateway]:
+    with owned_proxy_process(
+        gateway,
+        directory,
+        _pod_environment(isolated.database_url, isolated.redis),
+        config=config,
+        database_setup=(),
+        remove_environment=("DATABASE_URL_READ_REPLICA",),
+    ) as owned:
+        yield owned.gateway
+
+
+def _config_without(directory: Path, dropped: frozenset[str]) -> Path:
+    shared: Final = object_value(yaml.safe_load((ROOT / "tests/integration/proxy_config.yaml").read_text()))
+    litellm_settings: Final = {
+        name: value for name, value in object_value(shared["litellm_settings"]).items() if name not in dropped
+    }
+    path: Final = directory / f"proxy_config_{uuid.uuid4().hex}.yaml"
+    path.write_text(yaml.safe_dump({**shared, "litellm_settings": litellm_settings}, sort_keys=False))
+    return path
+
+
+@contextmanager
+def _isolated_without_redis(gateway: Gateway, directory: Path) -> Iterator[tuple[Gateway, str]]:
+    with (
+        scratch_database() as database_url,
+        owned_proxy_process(
+            gateway,
+            directory,
+            {"DATABASE_URL": database_url},
+            config=_config_without(directory, REDIS_SETTINGS),
+            remove_environment=("REDIS_HOST", "REDIS_PORT", "DATABASE_URL_READ_REPLICA"),
+        ) as owned,
+    ):
+        yield owned.gateway, database_url
+
+
+def _one_spend(rows: Sequence[Mapping[str, object]]) -> float:
+    assert len(rows) == 1, rows
+    return float(str(rows[0]["spend"]))
+
+
+def _key_spend(key: str, database_url: str | None = None) -> float:
+    return _one_spend(
+        read_rows(
+            'SELECT spend FROM "LiteLLM_VerificationToken" WHERE token=%s',
+            (sha256(key.encode()).hexdigest(),),
+            database_url=database_url,
+        )
+    )
+
+
+def _team_spend(team: str, database_url: str | None = None) -> float:
+    return _one_spend(
+        read_rows('SELECT spend FROM "LiteLLM_TeamTable" WHERE team_id=%s', (team,), database_url=database_url)
+    )
+
+
+def _user_spend(user: str, database_url: str | None = None) -> float:
+    return _one_spend(
+        read_rows('SELECT spend FROM "LiteLLM_UserTable" WHERE user_id=%s', (user,), database_url=database_url)
+    )
+
+
+def _organization_spend(organization: str, database_url: str | None = None) -> float:
+    return _one_spend(
+        read_rows(
+            'SELECT spend FROM "LiteLLM_OrganizationTable" WHERE organization_id=%s',
+            (organization,),
+            database_url=database_url,
+        )
+    )
+
+
+def _landed(read: Callable[[], float], least: float) -> float:
+    return eventually(read, lambda spend: spend >= least - 1e-9, seconds=DATABASE_SECONDS)
+
+
+def _chat(client: httpx.Client, model: str, key: str, *, end_user: str | None = None) -> httpx.Response:
+    return client.post(
+        "/v1/chat/completions",
+        json={
+            "model": model,
+            "messages": [{"role": "user", "content": f"reset path {uuid.uuid4().hex}"}],
+            **({} if end_user is None else {"user": end_user}),
+        },
+        headers={"Authorization": f"Bearer {key}"},
+    )
+
+
+def _assert_served(response: httpx.Response) -> str:
+    assert response.status_code == 200, response.text
+    body: Final = response.json()
+    assert body["usage"]["total_tokens"] == 40, body
+    return str(body["id"])
+
+
+def _assert_denied(response: httpx.Response) -> None:
+    assert response.status_code == 422, response.text
+    assert response.json()["error"]["type"] == "budget_exceeded", response.text
+
+
+def _assert_counters_unwritten(response: httpx.Response, saved: str) -> None:
+    assert response.status_code == 500, response.text
+    error: Final = response.json()["error"]
+    assert error["type"] == "internal_server_error", response.text
+    message: Final = str(error["message"])
+    assert message.startswith(f"{saved}, {LOST_COUNTERS}"), message
+    assert message.endswith(RETRY_HINT), message
+
+
+def _accepted_once_redis_is_back(request: Callable[[], httpx.Response]) -> None:
+    def attempt() -> int:
+        response: Final = request()
+        assert response.status_code in {200, 500}, response.text
+        return response.status_code
+
+    eventually(attempt, lambda code: code == 200, seconds=RECOVERY_SECONDS)
+
+
+def _fence(counter: str) -> str:
+    return f"{{{counter}}}:reset_fence"
+
+
+async def _repair_as_a_pod_would(redis: OwnedRedis, counter: str, value: float) -> float | None:
+    cache: Final = RedisCache(host=redis.host, port=redis.port)
+    assert cache.reset_fence_key(counter) == _fence(counter)
+    return await cache.async_set_max(
+        key=counter, value=value, ttl=SPEND_COUNTER_TTL_SECONDS, fence_key=cache.reset_fence_key(counter)
+    )
+
+
+def _state(cache: Redis, counter: str) -> tuple[float | None, int]:
+    return counter_value(cache, counter), counter_ttl(cache, counter)
+
+
+def _settled(cache: Redis, counter: str, spend: float) -> int:
+    _, ttl = eventually(
+        lambda: _state(cache, counter),
+        lambda state: state[0] is not None and state[0] == pytest.approx(spend, abs=1e-9),
+        seconds=SETTLE_SECONDS,
+    )
+    return ttl
+
+
+def _values(cache: Redis, counters: Sequence[str]) -> tuple[float | None, ...]:
+    return tuple(None if raw is None else float(raw) for raw in cache.mget(counters))
+
+
+def _ttls(cache: Redis, counters: Sequence[str]) -> tuple[int, ...]:
+    with cache.pipeline() as pipeline:
+        for counter in counters:
+            pipeline.ttl(counter)
+        return tuple(int(ttl) for ttl in pipeline.execute())
+
+
+def _exhaust(gateway: Gateway, cache: Redis, database_url: str, model: str, key: str) -> str:
+    counter: Final = key_counter(key)
+    _assert_served(_chat(gateway.client, model, key))
+    _settled(cache, counter, ONE_CALL_COST)
+    _landed(lambda: _key_spend(key, database_url), ONE_CALL_COST)
+    _assert_denied(_chat(gateway.client, model, key))
+    return counter
+
+
+def _global_reset(gateway: Gateway) -> None:
+    reset: Final = gateway.request("POST", "/global/spend/reset")
+    assert reset.status_code == 200, reset.text
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_global_spend_reset_admits_a_blocked_key_on_the_next_request(gateway: Gateway, tmp_path: Path) -> None:
+    with (
+        _isolated(gateway, tmp_path, workers=2) as isolated,
+        isolated.gateway.scenario() as scenario,
+        httpx.Client(base_url=str(isolated.gateway.client.base_url), timeout=60) as other_connection,
+    ):
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=ONE_CALL_COST)
+        counter: Final = _exhaust(isolated.gateway, isolated.cache, isolated.database_url, model, key)
+        _global_reset(isolated.gateway)
+        assert outlives(_settled(isolated.cache, counter, 0.0))
+        assert _key_spend(key, isolated.database_url) == 0.0
+        _assert_served(_chat(other_connection, model, key))
+        assert outlives(_settled(isolated.cache, counter, ONE_CALL_COST))
+        _assert_denied(_chat(other_connection, model, key))
+        _landed(lambda: _key_spend(key, isolated.database_url), ONE_CALL_COST)
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_global_spend_reset_admits_a_key_blocked_by_its_team_budget(gateway: Gateway, tmp_path: Path) -> None:
+    with _isolated(gateway, tmp_path) as isolated, isolated.gateway.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        team: Final = scenario.team(models=[model], max_budget=ONE_CALL_COST)
+        key: Final = scenario.key(team_id=team, models=[model])
+        counter: Final = f"spend:team:{team}"
+        _assert_served(_chat(isolated.gateway.client, model, key))
+        _settled(isolated.cache, counter, ONE_CALL_COST)
+        _landed(lambda: _team_spend(team, isolated.database_url), ONE_CALL_COST)
+        _assert_denied(_chat(isolated.gateway.client, model, key))
+        _global_reset(isolated.gateway)
+        assert outlives(_settled(isolated.cache, counter, 0.0))
+        assert _team_spend(team, isolated.database_url) == 0.0
+        _assert_served(_chat(isolated.gateway.client, model, key))
+        assert outlives(_settled(isolated.cache, counter, ONE_CALL_COST))
+        _assert_denied(_chat(isolated.gateway.client, model, key))
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_global_spend_reset_leaves_the_other_scopes_and_a_non_master_caller_alone(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    with _isolated(gateway, tmp_path) as isolated, isolated.gateway.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        organization: Final = scenario.organization(max_budget=50.0)
+        team: Final = scenario.team(models=[model], max_budget=20.0, organization_id=organization)
+        user: Final = scenario.user(max_budget=20.0)
+        added: Final = isolated.gateway.request(
+            "POST",
+            "/team/member_add",
+            {"team_id": team, "member": {"user_id": user, "role": "user"}, "max_budget_in_team": 20.0},
+        )
+        assert added.status_code == 200, added.text
+        tag: Final = f"integration-tag-{uuid.uuid4().hex}"
+        key: Final = scenario.key(team_id=team, user_id=user, models=[model], max_budget=5.0, tags=[tag])
+        end_user: Final = f"integration-end-user-{uuid.uuid4().hex}"
+        reset_counters: Final = (key_counter(key), f"spend:team:{team}")
+        kept_counters: Final = (
+            f"spend:team_member:{user}:{team}",
+            f"spend:user:{user}",
+            f"spend:end_user:{end_user}",
+            f"spend:tag:{tag}",
+            f"spend:org:{organization}",
+        )
+        _assert_served(_chat(isolated.gateway.client, model, key, end_user=end_user))
+        for counter in (*reset_counters, *kept_counters):
+            assert outlives(_settled(isolated.cache, counter, ONE_CALL_COST)), counter
+        _landed(lambda: _user_spend(user, isolated.database_url), ONE_CALL_COST)
+        _landed(lambda: _organization_spend(organization, isolated.database_url), ONE_CALL_COST)
+
+        forbidden: Final = isolated.gateway.request("POST", "/global/spend/reset", key=key)
+        assert forbidden.status_code == 401, forbidden.text
+        assert forbidden.json()["error"]["type"] == "auth_error", forbidden.text
+        assert _values(isolated.cache, (*reset_counters, *kept_counters)) == pytest.approx(
+            (ONE_CALL_COST,) * 7, abs=1e-9
+        )
+
+        _global_reset(isolated.gateway)
+        for counter in reset_counters:
+            assert outlives(_settled(isolated.cache, counter, 0.0)), counter
+        assert _values(isolated.cache, kept_counters) == pytest.approx((ONE_CALL_COST,) * 5, abs=1e-9)
+        assert all(outlives(ttl) for ttl in _ttls(isolated.cache, kept_counters)), _ttls(isolated.cache, kept_counters)
+        assert _key_spend(key, isolated.database_url) == 0.0
+        assert _team_spend(team, isolated.database_url) == 0.0
+        assert _user_spend(user, isolated.database_url) >= ONE_CALL_COST - 1e-9
+        assert _organization_spend(organization, isolated.database_url) >= ONE_CALL_COST - 1e-9
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_global_spend_reset_zeroes_every_key_counter_past_one_scan_page_and_broadcasts_them(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    with _isolated(gateway, tmp_path) as isolated:
+        stem: Final = f"spend:key:audit-{uuid.uuid4().hex}"
+        team_named_like_a_window: Final = f"spend:team:audit-{uuid.uuid4().hex}:window:prod"
+        counters: Final = (*(f"{stem}-{index}" for index in range(SEEDED_COUNTERS)), team_named_like_a_window)
+        windows: Final = tuple(f"{stem}-w{index}:window:1d" for index in range(3))
+        with isolated.cache.pipeline() as pipeline:
+            for name in (*counters, *windows):
+                pipeline.set(name, "1.0", ex=3600)
+            pipeline.execute()
+        with _broadcasts(isolated.cache) as broadcasts:
+            _global_reset(isolated.gateway)
+            eventually(
+                lambda: _values(isolated.cache, counters),
+                lambda values: all(value == 0.0 for value in values),
+                seconds=SETTLE_SECONDS,
+            )
+            ttls: Final = _ttls(isolated.cache, counters)
+            assert all(outlives(ttl) for ttl in ttls), sorted(ttls)[:5]
+            assert _values(isolated.cache, windows) == (1.0, 1.0, 1.0)
+            assert broadcasts.wait_for(
+                lambda received: {broadcast.key for broadcast in received if broadcast.value == 0.0} >= set(counters),
+                BROADCAST_SECONDS,
+            ), len(broadcasts.received())
+            assert not any(broadcast.key in windows for broadcast in broadcasts.received())
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_global_spend_reset_with_a_redis_batch_size_of_one_resets_and_fences_every_counter(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    with (
+        _isolated(gateway, tmp_path, settings=(("DEFAULT_MAX_REDIS_BATCH_CACHE_SIZE", "1"),)) as isolated,
+        isolated.gateway.scenario() as scenario,
+    ):
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=ONE_CALL_COST)
+        counter: Final = _exhaust(isolated.gateway, isolated.cache, isolated.database_url, model, key)
+        seeded: Final = tuple(f"spend:key:audit-{uuid.uuid4().hex}" for _ in range(2))
+        with isolated.cache.pipeline() as pipeline:
+            for name in seeded:
+                pipeline.set(name, "1.0", ex=3600)
+            pipeline.execute()
+        counters: Final = (counter, *seeded)
+        _global_reset(isolated.gateway)
+        assert isolated.cache.exists(*(_fence(name) for name in counters)) == len(counters)
+        assert _values(isolated.cache, counters) == (0.0, 0.0, 0.0)
+        assert all(outlives(ttl) for ttl in _ttls(isolated.cache, counters)), _ttls(isolated.cache, counters)
+        _assert_served(_chat(isolated.gateway.client, model, key))
+        assert outlives(_settled(isolated.cache, counter, ONE_CALL_COST))
+        _assert_denied(_chat(isolated.gateway.client, model, key))
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_pod_that_cached_the_pre_reset_floor_admits_the_next_request_after_a_reset_on_another_pod(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    with (
+        _isolated(gateway, tmp_path, config=_config_without(tmp_path, REDIS_AUTH_CACHE_SETTING)) as isolated,
+        _second_pod(gateway, tmp_path, isolated, _config_without(tmp_path, REDIS_AUTH_CACHE_SETTING)) as other_pod,
+        isolated.gateway.scenario() as scenario,
+    ):
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=ONE_CALL_COST)
+        counter: Final = _exhaust(isolated.gateway, isolated.cache, isolated.database_url, model, key)
+        with _broadcasts(isolated.cache) as broadcasts:
+            assert isolated.cache.set(counter, "0.0", ex=3600)
+            _assert_denied(_chat(other_pod.client, model, key))
+            _settled(isolated.cache, counter, ONE_CALL_COST)
+            _global_reset(isolated.gateway)
+            broadcasts.wait_for(_zeroed_with_its_floor(counter), RACE_WINDOW_SECONDS)
+            assert other_pod.client.get("/health/liveliness").status_code == 200
+            _assert_served(_chat(other_pod.client, model, key))
+            assert outlives(_settled(isolated.cache, counter, ONE_CALL_COST))
+            _assert_denied(_chat(other_pod.client, model, key))
+            assert broadcasts.wait_for(_zeroed(counter), BROADCAST_SECONDS), broadcasts.received()
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_global_spend_reset_fences_the_counter_against_a_stale_floor_repair(gateway: Gateway, tmp_path: Path) -> None:
+    with _isolated(gateway, tmp_path) as isolated, isolated.gateway.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=ONE_CALL_COST)
+        counter: Final = _exhaust(isolated.gateway, isolated.cache, isolated.database_url, model, key)
+        _global_reset(isolated.gateway)
+        assert outlives(_settled(isolated.cache, counter, 0.0))
+        assert isolated.cache.get(_fence(counter)) == b"1"
+        assert 0 < counter_ttl(isolated.cache, _fence(counter)) <= FENCE_SECONDS
+        assert asyncio.run(_repair_as_a_pod_would(isolated.redis, counter, ONE_CALL_COST)) == 0.0
+        value, ttl = _state(isolated.cache, counter)
+        assert value == 0.0 and outlives(ttl), (value, ttl)
+        _assert_served(_chat(isolated.gateway.client, model, key))
+        assert outlives(_settled(isolated.cache, counter, ONE_CALL_COST))
+        _assert_denied(_chat(isolated.gateway.client, model, key))
+        eventually(lambda: isolated.cache.exists(_fence(counter)), lambda found: found == 0, seconds=FENCE_SECONDS + 5)
+        late_total: Final = 2 * ONE_CALL_COST
+        assert asyncio.run(_repair_as_a_pod_would(isolated.redis, counter, late_total)) == pytest.approx(late_total)
+        value_after, ttl_after = _state(isolated.cache, counter)
+        assert value_after == pytest.approx(late_total) and outlives(ttl_after), (value_after, ttl_after)
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_global_spend_reset_while_redis_is_down_answers_500_and_the_retry_resets_the_counters(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    with _isolated(gateway, tmp_path) as isolated, isolated.gateway.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=ONE_CALL_COST)
+        counter: Final = _exhaust(isolated.gateway, isolated.cache, isolated.database_url, model, key)
+        isolated.redis.stop()
+        _assert_counters_unwritten(isolated.gateway.request("POST", "/global/spend/reset"), "Spend was reset")
+        assert _key_spend(key, isolated.database_url) == 0.0
+        _assert_served(_chat(isolated.gateway.client, model, key))
+        isolated.redis.start()
+        assert isolated.cache.ping()
+        _landed(lambda: _key_spend(key, isolated.database_url), ONE_CALL_COST)
+        _accepted_once_redis_is_back(lambda: isolated.gateway.request("POST", "/global/spend/reset"))
+        assert _key_spend(key, isolated.database_url) == 0.0
+        assert outlives(_settled(isolated.cache, counter, 0.0))
+        _assert_served(_chat(isolated.gateway.client, model, key))
+        assert outlives(_settled(isolated.cache, counter, ONE_CALL_COST))
+        _assert_denied(_chat(isolated.gateway.client, model, key))
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_global_spend_reset_without_redis_admits_the_next_request(gateway: Gateway, tmp_path: Path) -> None:
+    with _isolated_without_redis(gateway, tmp_path) as (owned, database_url), owned.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=ONE_CALL_COST)
+        _assert_served(_chat(owned.client, model, key))
+        _landed(lambda: _key_spend(key, database_url), ONE_CALL_COST)
+        _assert_denied(_chat(owned.client, model, key))
+        _global_reset(owned)
+        assert _key_spend(key, database_url) == 0.0
+        _assert_served(_chat(owned.client, model, key))
+        _landed(lambda: _key_spend(key, database_url), ONE_CALL_COST)
+        _assert_denied(_chat(owned.client, model, key))
+
+
+def _organization_entities(
+    gateway: Gateway, scenario: Scenario, database_url: str | None = None
+) -> tuple[str, str, str]:
+    model: Final = scenario.model(**RATES)
+    organization: Final = scenario.organization(max_budget=ONE_CALL_COST)
+    team: Final = scenario.team(models=[model], organization_id=organization)
+    key: Final = scenario.key(team_id=team, models=[model])
+    counter: Final = f"spend:org:{organization}"
+    _assert_served(_chat(gateway.client, model, key))
+    _landed(lambda: _organization_spend(organization, database_url), ONE_CALL_COST)
+    _assert_denied(_chat(gateway.client, model, key))
+    return model, key, counter
+
+
+def _organization_update(gateway: Gateway, counter: str, **fields: object) -> httpx.Response:
+    return gateway.request(
+        "PATCH", "/organization/update", {"organization_id": counter.removeprefix("spend:org:"), **fields}
+    )
+
+
+def _update_organization(gateway: Gateway, counter: str, **fields: object) -> None:
+    updated: Final = _organization_update(gateway, counter, **fields)
+    assert updated.status_code == 200, updated.text
+
+
+def test_an_organization_spend_set_to_zero_admits_a_key_blocked_by_the_organization_budget(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model, key, counter = _organization_entities(gateway, scenario)
+        _settled(cache, counter, ONE_CALL_COST)
+        with _broadcasts(cache) as broadcasts:
+            _update_organization(gateway, counter, spend=0.0)
+            assert outlives(_settled(cache, counter, 0.0))
+            assert _organization_spend(counter.removeprefix("spend:org:")) == 0.0
+            assert broadcasts.wait_for(_zeroed(counter), BROADCAST_SECONDS), broadcasts.received()
+        _assert_served(_chat(gateway.client, model, key))
+        assert outlives(_settled(cache, counter, ONE_CALL_COST))
+        _assert_denied(_chat(gateway.client, model, key))
+
+
+def test_an_organization_update_without_spend_keeps_the_counter_and_the_block(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model, key, counter = _organization_entities(gateway, scenario)
+        _settled(cache, counter, ONE_CALL_COST)
+        _update_organization(gateway, counter, metadata={"note": f"audit {uuid.uuid4().hex}"})
+        value, ttl = _state(cache, counter)
+        assert value == pytest.approx(ONE_CALL_COST, abs=1e-9) and outlives(ttl), (value, ttl)
+        _assert_denied(_chat(gateway.client, model, key))
+
+
+def test_an_organization_spend_set_above_the_budget_keeps_the_block_until_set_to_zero(gateway: Gateway) -> None:
+    with gateway.scenario() as scenario, rig_cache() as cache:
+        model, key, counter = _organization_entities(gateway, scenario)
+        _settled(cache, counter, ONE_CALL_COST)
+        _update_organization(gateway, counter, spend=1.5)
+        assert outlives(_settled(cache, counter, 1.5))
+        _assert_denied(_chat(gateway.client, model, key))
+        _update_organization(gateway, counter, spend=0.0)
+        assert outlives(_settled(cache, counter, 0.0))
+        _assert_served(_chat(gateway.client, model, key))
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_an_organization_spend_set_while_redis_is_down_answers_500_and_the_retry_resets_the_counter(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    with _isolated(gateway, tmp_path) as isolated, isolated.gateway.scenario() as scenario:
+        model, key, counter = _organization_entities(isolated.gateway, scenario, isolated.database_url)
+        organization: Final = counter.removeprefix("spend:org:")
+        _settled(isolated.cache, counter, ONE_CALL_COST)
+        isolated.redis.stop()
+        _assert_counters_unwritten(
+            _organization_update(isolated.gateway, counter, spend=0.0), "The organization spend was saved"
+        )
+        assert _organization_spend(organization, isolated.database_url) == 0.0
+        _assert_served(_chat(isolated.gateway.client, model, key))
+        isolated.redis.start()
+        assert isolated.cache.ping()
+        _accepted_once_redis_is_back(lambda: _organization_update(isolated.gateway, counter, spend=0.0))
+        assert _organization_spend(organization, isolated.database_url) == 0.0
+        assert outlives(_settled(isolated.cache, counter, 0.0))
+        _assert_served(_chat(isolated.gateway.client, model, key))
+        assert outlives(_settled(isolated.cache, counter, ONE_CALL_COST))
+        _assert_denied(_chat(isolated.gateway.client, model, key))
diff --git a/tests/integration/spend/test_spend_counter_ttl_chaos.py b/tests/integration/spend/test_spend_counter_ttl_chaos.py
new file mode 100644
index 00000000000..1cd6d9312be
--- /dev/null
+++ b/tests/integration/spend/test_spend_counter_ttl_chaos.py
@@ -0,0 +1,292 @@
+import uuid
+from collections.abc import Callable, Mapping
+from concurrent.futures import ThreadPoolExecutor
+from hashlib import sha256
+from pathlib import Path
+from typing import Final
+
+import httpx
+import pytest
+from integration._support.client import Gateway, eventually
+from integration._support.database import read_rows
+from integration._support.process import OwnedProxy, graceful_stop_seconds, owned_proxy_process
+from integration._support.redis_process import owned_redis
+from integration._support.spend_counters import (
+    counter_ttl,
+    counter_value,
+    key_counter,
+    outlives,
+    rig_cache,
+)
+from pydantic import JsonValue
+from redis import Redis
+
+pytestmark: Final = pytest.mark.shares_worker_state
+
+RATES: Final = {"input_cost_per_token": 0.001, "output_cost_per_token": 0.002}
+ANTHROPIC_HEADERS: Final = {"anthropic-version": "2023-06-01"}
+BURST: Final = 24
+UNBOUNDED_BUDGET: Final = 100000.0
+RESERVATION_ESTIMATE_CEILING: Final = 40.0
+SLOW_UPSTREAM_SECONDS: Final = 3.0
+LEAK_KEY_BUDGET: Final = 20.0
+CELL_TIMEOUT: Final = int(2 * graceful_stop_seconds() + 120)
+RESPAWN_SECONDS: Final = graceful_stop_seconds() + 60
+
+
+def _chat(gateway: Gateway, model: str, key: str, index: int, stream: bool) -> httpx.Response:
+    return gateway.request(
+        "POST",
+        "/v1/chat/completions",
+        {
+            "model": model,
+            "messages": [{"role": "user", "content": f"burst chat {index} {uuid.uuid4().hex}"}],
+            "stream": stream,
+            **({"stream_options": {"include_usage": True}} if stream else {}),
+        },
+        key=key,
+    )
+
+
+def _messages(gateway: Gateway, model: str, key: str, index: int, stream: bool) -> httpx.Response:
+    return gateway.request(
+        "POST",
+        "/v1/messages",
+        {
+            "model": model,
+            "max_tokens": 32,
+            "messages": [{"role": "user", "content": f"burst messages {index} {uuid.uuid4().hex}"}],
+            "stream": stream,
+        },
+        key=key,
+        headers=ANTHROPIC_HEADERS,
+    )
+
+
+def _responses(gateway: Gateway, model: str, key: str, index: int, stream: bool) -> httpx.Response:
+    return gateway.request(
+        "POST",
+        "/v1/responses",
+        {"model": model, "input": f"burst responses {index} {uuid.uuid4().hex}", "stream": stream},
+        key=key,
+    )
+
+
+SURFACES: Final[tuple[Callable[[Gateway, str, str, int, bool], httpx.Response], ...]] = (
+    _chat,
+    _messages,
+    _responses,
+)
+
+
+def _spend_rows(key: str) -> list[dict[str, JsonValue]]:
+    return read_rows(
+        'SELECT request_id, spend, status FROM "LiteLLM_SpendLogs" WHERE api_key=%s',
+        (sha256(key.encode()).hexdigest(),),
+    )
+
+
+def _successes(key: str, count: int) -> list[dict[str, JsonValue]]:
+    rows: Final = eventually(
+        lambda: [row for row in _spend_rows(key) if str(row["status"]) == "success"],
+        lambda values: len(values) >= count,
+        seconds=90,
+    )
+    assert len(rows) == count, rows
+    assert len({str(row["request_id"]) for row in rows}) == count, rows
+    return rows
+
+
+def _counter_matches(cache: Redis, counter: str, total: float) -> tuple[float | None, int]:
+    state: Final = eventually(
+        lambda: (counter_value(cache, counter), counter_ttl(cache, counter)),
+        lambda values: values[0] is not None and values[0] == pytest.approx(total, abs=1e-9),
+        seconds=20,
+    )
+    assert outlives(state[1]), state
+    return state
+
+
+def test_a_burst_with_upstream_failures_lands_each_success_once_with_a_long_ttl(gateway: Gateway) -> None:
+    with (
+        httpx.Client(base_url=gateway.upstream_url, timeout=5, trust_env=False) as upstream,
+        gateway.scenario() as scenario,
+        rig_cache() as cache,
+    ):
+        provider_model: Final = f"burst-{uuid.uuid4().hex}"
+        model: Final = scenario.model(model=f"openai/{provider_model}", **RATES)
+        key: Final = scenario.key(models=[model], max_budget=UNBOUNDED_BUDGET)
+        statuses: Final = [500] + [200, 200, 200] * (BURST // 4 + 2)
+
+        def remove_script() -> None:
+            response: Final = upstream.delete(f"/__scripts/{provider_model}")
+            assert response.status_code in (200, 404), response.text
+
+        scenario.cleanups.callback(remove_script)
+        configured: Final = upstream.post(f"/__scripts/{provider_model}", json={"statuses": statuses})
+        assert configured.status_code == 200, configured.text
+
+        def attempt(index: int) -> httpx.Response:
+            stream: Final = index % 2 == 1
+            return SURFACES[index % len(SURFACES)](gateway, model, key, index, stream)
+
+        with ThreadPoolExecutor(max_workers=BURST) as pool:
+            responses: Final = tuple(pool.map(attempt, range(BURST)))
+        codes: Final = [response.status_code for response in responses]
+        assert all(code in (200, 500) for code in codes), codes
+        succeeded: Final = codes.count(200)
+        assert 0 < succeeded < BURST, codes
+        rows: Final = _successes(key, succeeded)
+        total: Final = sum(float(str(row["spend"])) for row in rows)
+        assert total == pytest.approx(succeeded * 0.06), rows
+        _counter_matches(cache, key_counter(key), total)
+
+
+def _workers(owned: OwnedProxy) -> tuple[int, ...]:
+    return tuple(sorted(owned.worker_pids()))
+
+
+def _attempt(gateway: Gateway, model: str, key: str, index: int) -> int:
+    try:
+        return _chat(gateway, model, key, index, False).status_code
+    except httpx.HTTPError:
+        return 0
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_killed_worker_does_not_shorten_or_lose_the_counter(gateway: Gateway, tmp_path: Path) -> None:
+    with (
+        owned_proxy_process(gateway, tmp_path, {}, workers=2) as owned,
+        owned.gateway.scenario() as scenario,
+        rig_cache() as cache,
+    ):
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=UNBOUNDED_BUDGET)
+        before: Final = _workers(owned)
+        assert len(before) == 2, before
+        with ThreadPoolExecutor(max_workers=12) as pool:
+            first: Final = pool.submit(_attempt, owned.gateway, model, key, 0)
+            assert first.result(timeout=60) == 200
+            in_flight: Final = [pool.submit(_attempt, owned.gateway, model, key, index) for index in range(1, 12)]
+            with owned.replacing_worker(before[0]) as kill:
+                kill()
+                survivor: Final = _attempt(owned.gateway, model, key, 99)
+            codes: Final = [future.result(timeout=120) for future in in_flight]
+        assert survivor == 200, survivor
+        assert all(code in (0, 200) for code in codes), codes
+        replaced: Final = eventually(
+            lambda: _workers(owned),
+            lambda pids: len(pids) == 2 and before[0] not in pids and before[1] in pids,
+            seconds=RESPAWN_SECONDS,
+        )
+        assert replaced
+        after: Final = [_attempt(owned.gateway, model, key, index) for index in range(12, 18)]
+        assert after == [200] * 6, after
+        answered: Final = 1 + 1 + codes.count(200) + 6
+        landed: Final = eventually(
+            lambda: [row for row in _spend_rows(key) if str(row["status"]) == "success"],
+            lambda rows: len(rows) >= 1 + 1 + 6,
+            seconds=90,
+        )
+        assert len({str(row["request_id"]) for row in landed}) == len(landed) <= answered, landed
+        ceiling: Final = answered * 0.06 + len(in_flight) * RESERVATION_ESTIMATE_CEILING
+        state: Final = eventually(
+            lambda: (counter_value(cache, key_counter(key)), counter_ttl(cache, key_counter(key))),
+            lambda values: values[0] is not None and 8 * 0.06 - 1e-9 <= values[0] <= ceiling,
+            seconds=20,
+        )
+        assert outlives(state[1]), state
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_reservation_leaked_by_a_killed_worker_stays_for_the_counter_ttl(gateway: Gateway, tmp_path: Path) -> None:
+    with (
+        owned_proxy_process(gateway, tmp_path, {}, workers=2) as owned,
+        owned.gateway.scenario() as scenario,
+        rig_cache() as cache,
+    ):
+        slow: Final = scenario.model(model="openai/slow-endpoint", **RATES)
+        key: Final = scenario.key(models=[slow], max_budget=LEAK_KEY_BUDGET)
+        counter: Final = key_counter(key)
+        before: Final = _workers(owned)
+        assert len(before) == 2, before
+        with ThreadPoolExecutor(max_workers=1) as pool:
+            in_flight: Final = pool.submit(_attempt, owned.gateway, slow, key, 0)
+            reserved: Final = eventually(
+                lambda: counter_value(cache, counter),
+                lambda value: value is not None and value >= LEAK_KEY_BUDGET - 1e-9,
+                seconds=SLOW_UPSTREAM_SECONDS,
+            )
+            with owned.replacing_worker(before[0]) as first, owned.replacing_worker(before[1]) as second:
+                first.freeze()
+                second.freeze()
+                first()
+                second()
+            interrupted: Final = in_flight.result(timeout=60)
+        assert interrupted != 200, interrupted
+        leaked: Final = (counter_value(cache, counter), counter_ttl(cache, counter))
+        assert leaked[0] == pytest.approx(reserved), (reserved, leaked)
+        respawned: Final = eventually(
+            lambda: _workers(owned),
+            lambda pids: len(pids) == 2 and not set(pids) & set(before),
+            seconds=RESPAWN_SECONDS,
+        )
+        assert respawned
+        blocked: Final = eventually(
+            lambda: _attempt(owned.gateway, slow, key, 1), lambda code: code == 422, seconds=RESPAWN_SECONDS
+        )
+        assert blocked == 422, (blocked, leaked)
+        held: Final = (counter_value(cache, counter), counter_ttl(cache, counter))
+        assert held[0] == pytest.approx(reserved), (reserved, held)
+        assert outlives(held[1]), held
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_redis_outage_mid_burst_keeps_serving_and_rebuilds_the_counter_long(gateway: Gateway, tmp_path: Path) -> None:
+    with owned_redis(tmp_path) as redis:
+        overrides: Final[Mapping[str, str]] = {
+            "REDIS_HOST": redis.host,
+            "REDIS_PORT": str(redis.port),
+            "REDIS_CIRCUIT_BREAKER_RECOVERY_TIMEOUT": "2",
+        }
+        with (
+            owned_proxy_process(gateway, tmp_path, overrides) as owned,
+            owned.gateway.scenario() as scenario,
+            Redis(host=redis.host, port=redis.port) as cache,
+        ):
+            model: Final = scenario.model(**RATES)
+            key: Final = scenario.key(models=[model], max_budget=UNBOUNDED_BUDGET)
+            counter: Final = key_counter(key)
+
+            def burst(start: int) -> list[int]:
+                with ThreadPoolExecutor(max_workers=6) as pool:
+                    return list(
+                        pool.map(lambda index: _attempt(owned.gateway, model, key, index), range(start, start + 6))
+                    )
+
+            assert burst(0) == [200] * 6
+            _counter_matches(cache, counter, 6 * 0.06)
+            redis.stop()
+            during: Final = burst(6)
+            assert during == [200] * 6, during
+            redis.start()
+            assert cache.ping()
+            probes: Final[list[int]] = []
+
+            def probe_until_the_counter_is_back() -> float | None:
+                probes.append(_attempt(owned.gateway, model, key, 100 + len(probes)))
+                return counter_value(cache, counter)
+
+            eventually(probe_until_the_counter_is_back, lambda value: value is not None, seconds=30)
+            assert set(probes) == {200}, probes
+            after: Final = burst(12)
+            assert after == [200] * 6, after
+            rows: Final = _successes(key, 18 + len(probes))
+            total: Final = sum(float(str(row["spend"])) for row in rows)
+            assert total == pytest.approx((18 + len(probes)) * 0.06), rows
+            rebuilt: Final = eventually(
+                lambda: (counter_value(cache, counter), counter_ttl(cache, counter)),
+                lambda state: state[0] is not None and 7 * 0.06 - 1e-9 <= state[0] <= total + 1e-9,
+                seconds=20,
+            )
+            assert outlives(rebuilt[1]), rebuilt
diff --git a/tests/integration/spend/test_spend_counter_ttl_settings.py b/tests/integration/spend/test_spend_counter_ttl_settings.py
new file mode 100644
index 00000000000..c0fe74603cc
--- /dev/null
+++ b/tests/integration/spend/test_spend_counter_ttl_settings.py
@@ -0,0 +1,230 @@
+import json
+import os
+import time
+import uuid
+from collections.abc import Mapping
+from concurrent.futures import ThreadPoolExecutor
+from datetime import UTC, datetime, timedelta
+from hashlib import sha256
+from pathlib import Path
+from types import MappingProxyType
+from typing import Final
+
+import psycopg
+import pytest
+import yaml
+from integration._support.client import Gateway, eventually, object_value
+from integration._support.database import read_rows
+from integration._support.process import graceful_stop_seconds, owned_proxy
+from integration._support.spend_counters import counter_ttl, counter_value, key_counter, outlives, rig_cache
+from pydantic import JsonValue
+
+pytestmark: Final = pytest.mark.shares_worker_state
+
+ROOT: Final = Path(os.environ.get("INTEGRATION_PROXY_ROOT") or Path(__file__).resolve().parents[3])
+RATES: Final = {"input_cost_per_token": 0.001, "output_cost_per_token": 0.002}
+ONE_CALL_COST: Final = 0.06
+SLOW_UPSTREAM_SECONDS: Final = 3.0
+SHORT_REDIS_TTL: Final = 4
+LONG_REDIS_TTL: Final = 86400
+ENV_REDIS_TTL: Final = "7200"
+LONG_BATCH_WRITE_SECONDS: Final = 900
+STRICT_KEY_BUDGET: Final = 50.0
+CELL_TIMEOUT: Final = int(2 * graceful_stop_seconds() + 120)
+FAST_RESET_TICK: Final = MappingProxyType(
+    {"PROXY_BUDGET_RESCHEDULER_MIN_TIME": "2", "PROXY_BUDGET_RESCHEDULER_MAX_TIME": "2"}
+)
+
+
+def _config(
+    directory: Path,
+    *,
+    litellm_settings: Mapping[str, JsonValue] = MappingProxyType({}),
+    general_settings: Mapping[str, JsonValue] = MappingProxyType({}),
+) -> Path:
+    shared: Final = object_value(yaml.safe_load((ROOT / "tests/integration/proxy_config.yaml").read_text()))
+    configured: Final = {
+        **shared,
+        "litellm_settings": {**object_value(shared["litellm_settings"]), **litellm_settings},
+        "general_settings": {**object_value(shared["general_settings"]), **general_settings},
+    }
+    path: Final = directory / f"proxy_config_{uuid.uuid4().hex}.yaml"
+    path.write_text(yaml.safe_dump(configured, sort_keys=False))
+    return path
+
+
+def _chat(gateway: Gateway, model: str, key: str) -> str:
+    served: Final = gateway.chat(model, key=key, text=f"settings {uuid.uuid4().hex}")
+    assert served["usage"]["total_tokens"] == 40, served
+    return str(served["id"])
+
+
+def _counter_state(counter: str) -> tuple[float | None, int]:
+    with rig_cache() as cache:
+        return counter_value(cache, counter), counter_ttl(cache, counter)
+
+
+def _settled(counter: str, spend: float, expected_ttl: int) -> tuple[float | None, int]:
+    return eventually(
+        lambda: _counter_state(counter),
+        lambda state: state[0] is not None and state[0] == pytest.approx(spend) and outlives(state[1], expected_ttl),
+        seconds=15,
+    )
+
+
+def _spend_rows(key: str) -> list[dict[str, JsonValue]]:
+    return read_rows('SELECT request_id FROM "LiteLLM_SpendLogs" WHERE api_key=%s', (sha256(key.encode()).hexdigest(),))
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_null_default_redis_ttl_falls_back_to_the_hour_floor(gateway: Gateway, tmp_path: Path) -> None:
+    config: Final = _config(tmp_path, litellm_settings={"default_redis_ttl": None})
+    with owned_proxy(gateway, tmp_path, {}, config=config) as owned, owned.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=5.0)
+        assert _chat(owned, model, key)
+        assert _settled(key_counter(key), ONE_CALL_COST, 3600)
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_short_default_redis_ttl_never_shortens_the_counter_and_the_lease_refresh_keeps_it_long(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    config: Final = _config(tmp_path, litellm_settings={"default_redis_ttl": SHORT_REDIS_TTL})
+    with owned_proxy(gateway, tmp_path, {}, config=config) as owned, owned.scenario() as scenario, rig_cache() as cache:
+        model: Final = scenario.model(model="openai/slow-endpoint", **RATES)
+        key: Final = scenario.key(models=[model], max_budget=5.0)
+        counter: Final = key_counter(key)
+        with ThreadPoolExecutor(max_workers=1) as pool:
+            slow: Final = pool.submit(lambda: (_chat(owned, model, key), time.monotonic())[1])
+            eventually(lambda: cache.exists(counter), lambda present: present == 1, seconds=SLOW_UPSTREAM_SECONDS)
+            assert cache.expire(counter, 1000)
+            refreshed_at: Final = eventually(
+                lambda: (time.monotonic(), counter_ttl(cache, counter)),
+                lambda state: outlives(state[1]),
+                seconds=SLOW_UPSTREAM_SECONDS + 10,
+            )[0]
+            finished_at: Final = slow.result(timeout=60)
+        assert refreshed_at < finished_at, (refreshed_at, finished_at)
+        assert _settled(counter, ONE_CALL_COST, 3600)
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_long_default_redis_ttl_wins_on_every_write_path(gateway: Gateway, tmp_path: Path) -> None:
+    config: Final = _config(tmp_path, litellm_settings={"default_redis_ttl": LONG_REDIS_TTL})
+    with owned_proxy(gateway, tmp_path, {}, config=config) as owned, owned.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=5.0)
+        counter: Final = key_counter(key)
+        assert _chat(owned, model, key)
+        assert _settled(counter, ONE_CALL_COST, LONG_REDIS_TTL)
+        updated: Final = owned.request("POST", "/key/update", {"key": key, "spend": 2.5})
+        assert updated.status_code == 200, updated.text
+        assert _settled(counter, 2.5, LONG_REDIS_TTL)
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_default_redis_ttl_given_as_an_environment_string_is_read_as_seconds(
+    gateway: Gateway, tmp_path: Path
+) -> None:
+    config: Final = _config(tmp_path, litellm_settings={"default_redis_ttl": "os.environ/SPEND_COUNTER_REDIS_TTL"})
+    overrides: Final = {"SPEND_COUNTER_REDIS_TTL": ENV_REDIS_TTL}
+    with owned_proxy(gateway, tmp_path, overrides, config=config) as owned, owned.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=5.0)
+        counter: Final = key_counter(key)
+        assert _chat(owned, model, key)
+        assert _settled(counter, ONE_CALL_COST, int(ENV_REDIS_TTL))
+        reset: Final = owned.request("POST", f"/key/{key}/reset_spend", {"reset_to": 0.0})
+        assert reset.status_code == 200, reset.text
+        assert _settled(counter, 0.0, int(ENV_REDIS_TTL))
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_long_batch_write_interval_lifts_the_counter_ttl(gateway: Gateway, tmp_path: Path) -> None:
+    config: Final = _config(tmp_path, general_settings={"proxy_batch_write_at": LONG_BATCH_WRITE_SECONDS})
+    with owned_proxy(gateway, tmp_path, {}, config=config) as owned, owned.scenario() as scenario:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=5.0)
+        assert _chat(owned, model, key)
+        assert _settled(key_counter(key), ONE_CALL_COST, 10 * LONG_BATCH_WRITE_SECONDS)
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_strict_enforcement_repairs_a_stale_low_key_counter_with_the_long_ttl(gateway: Gateway, tmp_path: Path) -> None:
+    config: Final = _config(tmp_path, general_settings={"fail_closed_budget_enforcement": True})
+    with owned_proxy(gateway, tmp_path, {}, config=config) as owned, owned.scenario() as scenario, rig_cache() as cache:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], max_budget=STRICT_KEY_BUDGET)
+        counter: Final = key_counter(key)
+        assert _chat(owned, model, key)
+        eventually(
+            lambda: read_rows(
+                'SELECT spend FROM "LiteLLM_VerificationToken" WHERE token=%s', (sha256(key.encode()).hexdigest(),)
+            ),
+            lambda rows: len(rows) == 1 and float(str(rows[0]["spend"])) >= ONE_CALL_COST,
+            seconds=70,
+        )
+        attempts: Final[list[str]] = []
+
+        def stale_then_request() -> tuple[float | None, int]:
+            assert cache.set(counter, "0.01")
+            attempts.append(_chat(owned, model, key))
+            return eventually(
+                lambda: (counter_value(cache, counter), counter_ttl(cache, counter)),
+                lambda state: state[0] is not None and state[0] < STRICT_KEY_BUDGET / 2,
+                seconds=15,
+            )
+
+        repaired: Final = eventually(
+            stale_then_request,
+            lambda state: state[0] is not None and state[0] > 0.01 + ONE_CALL_COST + 1e-6,
+            seconds=30,
+        )
+        lifted: Final = repaired[0]
+        assert (
+            lifted is not None and 2 * ONE_CALL_COST - 1e-9 <= lifted <= (len(attempts) + 1) * ONE_CALL_COST + 1e-9
+        ), (
+            repaired,
+            attempts,
+        )
+        assert outlives(repaired[1]), repaired
+
+
+def _window_reset_at(key: str) -> datetime:
+    rows: Final = read_rows(
+        'SELECT budget_limits FROM "LiteLLM_VerificationToken" WHERE token=%s', (sha256(key.encode()).hexdigest(),)
+    )
+    assert len(rows) == 1, rows
+    raw: Final = rows[0]["budget_limits"]
+    windows: Final = json.loads(raw) if isinstance(raw, str) else raw
+    assert isinstance(windows, list) and len(windows) == 1, raw
+    return datetime.fromisoformat(str(object_value(windows[0])["reset_at"]).replace("Z", "+00:00"))
+
+
+def _make_window_due(key: str) -> None:
+    due: Final = (datetime.now(UTC) - timedelta(days=1)).replace(tzinfo=None).isoformat()
+    windows: Final = [{"max_budget": 1.0, "budget_duration": "1d", "reset_at": due}]
+    with psycopg.connect(os.environ["DATABASE_URL"]) as connection:
+        connection.execute(
+            'UPDATE "LiteLLM_VerificationToken" SET budget_limits = %s::jsonb WHERE token = %s',
+            (json.dumps(windows), sha256(key.encode()).hexdigest()),
+        )
+
+
+@pytest.mark.timeout(CELL_TIMEOUT)
+def test_a_reset_budget_window_keeps_the_long_ttl(gateway: Gateway, tmp_path: Path) -> None:
+    with owned_proxy(gateway, tmp_path, FAST_RESET_TICK) as owned, owned.scenario() as scenario, rig_cache() as cache:
+        model: Final = scenario.model(**RATES)
+        key: Final = scenario.key(models=[model], budget_limits=[{"max_budget": 1.0, "budget_duration": "1d"}])
+        window_counter: Final = f"{key_counter(key)}:window:1d"
+        assert _chat(owned, model, key)
+        assert _settled(window_counter, ONE_CALL_COST, 3600)
+        _make_window_due(key)
+        rolled: Final = eventually(
+            lambda: (_window_reset_at(key), counter_value(cache, window_counter), counter_ttl(cache, window_counter)),
+            lambda state: state[0].replace(tzinfo=None) > datetime.now(UTC).replace(tzinfo=None),
+            seconds=45,
+        )
+        assert rolled[1] is not None and rolled[1] < ONE_CALL_COST, rolled
+        assert outlives(rolled[2]), rolled
diff --git a/tests/unit/caching/test_redis_cache.py b/tests/unit/caching/test_redis_cache.py
index 0fbeb05e154..50160299b58 100644
--- a/tests/unit/caching/test_redis_cache.py
+++ b/tests/unit/caching/test_redis_cache.py
@@ -403,6 +403,44 @@ async def test_async_scan_iter_namespaces_pattern(namespace, expected_match, mon
     assert captured["match"] == expected_match
 
 
+@pytest.mark.asyncio
+async def test_async_scan_iter_decodes_bytes_keys_and_stops_at_count(monkeypatch, redis_no_ping):
+    monkeypatch.setenv("REDIS_HOST", "https://my-test-host")
+    redis_cache = RedisCache()
+
+    def scan_iter(match, count):
+        async def gen():
+            for key in (b"spend:key:a", "spend:key:b", b"spend:key:c", b"spend:key:d"):
+                yield key
+
+        return gen()
+
+    mock_redis_instance = MagicMock()
+    mock_redis_instance.scan_iter = scan_iter
+    with patch.object(redis_cache, "init_async_client", return_value=mock_redis_instance):
+        keys = await redis_cache.async_scan_iter(pattern="spend:key:", count=3)
+    assert keys == ["spend:key:a", "spend:key:b", "spend:key:c"]
+
+
+@pytest.mark.asyncio
+async def test_async_scan_iter_unbounded_returns_every_matching_key(monkeypatch, redis_no_ping):
+    monkeypatch.setenv("REDIS_HOST", "https://my-test-host")
+    redis_cache = RedisCache()
+
+    def scan_iter(match, count):
+        async def gen():
+            for key in (b"spend:key:a", "spend:key:b", b"spend:key:c", b"spend:key:d"):
+                yield key
+
+        return gen()
+
+    mock_redis_instance = MagicMock()
+    mock_redis_instance.scan_iter = scan_iter
+    with patch.object(redis_cache, "init_async_client", return_value=mock_redis_instance):
+        keys = await redis_cache.async_scan_iter(pattern="spend:key:", count=3, unbounded=True)
+    assert keys == ["spend:key:a", "spend:key:b", "spend:key:c", "spend:key:d"]
+
+
 @pytest.mark.parametrize("namespace, expected", [(None, "k"), ("ns", "ns:k")])
 def test_increment_cache_namespaces_key(namespace, expected, monkeypatch, redis_no_ping):
     monkeypatch.setenv("REDIS_HOST", "https://my-test-host")
@@ -1516,6 +1554,65 @@ async def test_async_set_cache_pipeline_with_ttls_keeps_each_entry_ttl(monkeypat
     ]
 
 
+class _LostPipeline(_SetRecordingPipeline):
+    async def execute(self) -> list[bool]:
+        from redis.exceptions import ConnectionError as RedisConnectionError
+
+        raise RedisConnectionError("redis down")
+
+
+@pytest.mark.asyncio
+async def test_async_set_cache_pipeline_with_ttls_returns_the_error_of_a_lost_write(monkeypatch, redis_no_ping):
+    """A spend reset must not report success on a write Redis never applied, so the lost write comes back
+    as a value while every other caller keeps ignoring it."""
+    from redis.exceptions import ConnectionError as RedisConnectionError
+
+    monkeypatch.setenv("REDIS_HOST", "https://my-test-host")
+    redis_cache = RedisCache()
+    client = MagicMock()
+    client.pipeline = MagicMock(side_effect=(_LostPipeline(), _SetRecordingPipeline()))
+
+    with patch.object(redis_cache, "init_async_client", return_value=client):
+        lost = await redis_cache.async_set_cache_pipeline_with_ttls((("k", 1, 60),))
+        kept = await redis_cache.async_set_cache_pipeline_with_ttls((("k", 1, 60),))
+
+    assert isinstance(lost, RedisConnectionError)
+    assert kept is None
+
+
+@pytest.mark.parametrize("namespace", [None, "ns"])
+def test_reset_fence_key_shares_the_cluster_slot_of_its_counter(namespace, monkeypatch, redis_no_ping):
+    """The repair checks the fence and the counter in one Lua call, which a cluster only runs on one slot."""
+    from redis.crc import key_slot
+
+    monkeypatch.setenv("REDIS_HOST", "https://my-test-host")
+    redis_cache = RedisCache(namespace=namespace)
+    counter = redis_cache.check_and_fix_namespace(key="spend:key:abc")
+    fence = redis_cache.check_and_fix_namespace(key=redis_cache.reset_fence_key("spend:key:abc"))
+
+    assert fence != counter
+    assert key_slot(fence.encode()) == key_slot(counter.encode())
+
+
+@pytest.mark.asyncio
+async def test_async_set_max_declares_the_reset_fence_as_a_second_key(monkeypatch, redis_no_ping):
+    monkeypatch.setenv("REDIS_HOST", "https://my-test-host")
+    redis_cache = RedisCache(namespace="ns")
+    client = MagicMock()
+    client.eval = AsyncMock(return_value=b"3.0")
+
+    with patch.object(redis_cache, "init_async_client", return_value=client):
+        held = await redis_cache.async_set_max(
+            key="spend:key:abc", value=12.0, ttl=60, fence_key=redis_cache.reset_fence_key("spend:key:abc")
+        )
+        unfenced = await redis_cache.async_set_max(key="spend:key:abc", value=12.0, ttl=60)
+
+    assert (held, unfenced) == (3.0, 3.0)
+    fenced_call, plain_call = client.eval.await_args_list
+    assert fenced_call.args[1:4] == (2, "ns:spend:key:abc", "ns:{ns:spend:key:abc}:reset_fence")
+    assert plain_call.args[1:3] == (1, "ns:spend:key:abc")
+
+
 class _ListPipeline:
     def __init__(self, rows: list[str]) -> None:
         self.rows = rows
diff --git a/tests/unit/proxy/auth/test_auth_checks_object_access_and_lookup.py b/tests/unit/proxy/auth/test_auth_checks_object_access_and_lookup.py
index 78ce9728f3b..0e761eb5fd1 100644
--- a/tests/unit/proxy/auth/test_auth_checks_object_access_and_lookup.py
+++ b/tests/unit/proxy/auth/test_auth_checks_object_access_and_lookup.py
@@ -10696,7 +10696,8 @@ async def test_invalidate_team_member_spend_state_sets_new_spend_instead_of_dele
         )
 
     assert spend.memory == {"spend:team_member:user-1:team-1": 2.5}
-    assert spend.commands == ["SET spend:team_member:user-1:team-1 2.5 60"]
+    assert spend.memory_ttls == {"spend:team_member:user-1:team-1": 60}
+    assert spend.commands == [f"SET spend:team_member:user-1:team-1 2.5 {spend.counter_ttl}"]
 
 
 @pytest.mark.asyncio
@@ -10823,6 +10824,7 @@ async def test_invalidate_team_member_spend_state_broadcasts_the_spend_counter_t
         redis_cache=_FakeRedisCache(),
         user_api_key_cache=remote_user_api_key_cache,
         additional_in_memory_caches=(remote_spend_counter_in_memory_cache,),
+        counter_cache=remote_spend_counter_in_memory_cache,
         spend_counters=remote_spend_counter_store,
     )
     for cache_key in ("spend:team_member:user-1:team-1", "spend_db_floor:spend:team_member:user-1:team-1"):
diff --git a/tests/unit/proxy/common_utils/test_auth_cache_invalidation_pubsub.py b/tests/unit/proxy/common_utils/test_auth_cache_invalidation_pubsub.py
index d41c4595a0d..72f806c249b 100644
--- a/tests/unit/proxy/common_utils/test_auth_cache_invalidation_pubsub.py
+++ b/tests/unit/proxy/common_utils/test_auth_cache_invalidation_pubsub.py
@@ -19,6 +19,7 @@ from litellm.proxy.common_utils.auth_cache_invalidation_pubsub import (
     broadcast_evictions,
     evict_and_broadcast,
     publish_auth_cache_invalidation,
+    publish_auth_cache_invalidations,
 )
 from litellm.proxy.common_utils.user_api_key_cache import (
     AUTH_OBJECTS_TARGET,
@@ -324,6 +325,92 @@ async def test_subscriber_deletes_additional_in_memory_cache_entry_on_message()
     assert spend_counter_in_memory_cache.get_cache("spend:team_member:u-1:t-1") is None
 
 
+@pytest.mark.asyncio
+async def test_publish_many_sends_one_message_per_five_hundred_keys() -> None:
+    client = _RecordingRedisClient()
+    keys = tuple(f"spend:key:{index}" for index in range(1001))
+    with patch(
+        "litellm.proxy.common_utils.auth_cache_invalidation_pubsub.coordination_redis_cache",
+        return_value=_FakeRedisCache(client=client),
+    ):
+        await publish_auth_cache_invalidations(cache_keys=keys, new_value=0.0, ttl=5)
+        await asyncio.gather(*pubsub_module._pending_publishes)
+
+    assert [channel for channel, _ in client.published] == [AUTH_CACHE_INVALIDATION_CHANNEL] * 3
+    assert [json.loads(message) for _, message in client.published] == [
+        {"cache_keys": list(keys[:500]), "new_value": 0.0, "ttl": 5},
+        {"cache_keys": list(keys[500:1000]), "new_value": 0.0, "ttl": 5},
+        {"cache_key": keys[1000], "new_value": 0.0, "ttl": 5},
+    ]
+
+
+@pytest.mark.asyncio
+async def test_subscriber_sets_every_key_of_a_multi_key_message_in_the_counter_cache_only() -> None:
+    """A global reset broadcasts thousands of counters; written into every additional cache they would evict
+    the BYOK credentials cached next to them."""
+    cache = UserApiKeyCache()
+    spend_counter_in_memory_cache = InMemoryCache()
+    spend_counter_in_memory_cache.set_cache("spend:key:a", 999.0)
+    spend_counter_in_memory_cache.set_cache("spend_db_floor:spend:key:a", 999.0)
+    byok_cache = InMemoryCache()
+    byok_cache.set_cache("byok:cred-1", {"api_key": "sk-cred"})
+    message = {
+        "type": "message",
+        "data": json.dumps({"cache_keys": ["spend:key:a", "spend:key:b"], "new_value": 0.0, "ttl": 60}).encode(),
+    }
+
+    pubsub = _QueuePubSub(initial_messages=[message])
+    subscriber = AuthCacheInvalidationSubscriber(
+        redis_cache=_FakeRedisCache(client=_ScriptedPubSubRedisClient(pubsubs=[pubsub])),
+        user_api_key_cache=cache,
+        additional_in_memory_caches=(spend_counter_in_memory_cache, byok_cache),
+        counter_cache=spend_counter_in_memory_cache,
+    )
+    subscriber.start()
+    try:
+        for _ in range(200):
+            if spend_counter_in_memory_cache.get_cache("spend:key:b") == 0.0:
+                break
+            await asyncio.sleep(0.01)
+    finally:
+        await subscriber.stop()
+
+    assert spend_counter_in_memory_cache.get_cache("spend:key:a") == 0.0
+    assert spend_counter_in_memory_cache.get_cache("spend:key:b") == 0.0
+    assert spend_counter_in_memory_cache.get_cache("spend_db_floor:spend:key:a") == 999.0
+    assert byok_cache.get_cache("byok:cred-1") == {"api_key": "sk-cred"}
+    assert byok_cache.get_cache("spend:key:a") is None
+
+
+@pytest.mark.asyncio
+async def test_subscriber_writes_every_key_of_a_multi_key_message_to_the_native_spend_counter_copies() -> None:
+    """A global reset sends thousands of counters in one message, and each counter's native copy has to take the new
+    value or that worker keeps answering with the old spend when Redis cannot."""
+    store = SpendCounterStore(connect(None).spend_counters())
+    store.set_local("spend:key:a", 999.0)
+    store.set_local("spend:key:b", 999.0)
+    pubsub = _QueuePubSub(
+        initial_messages=[
+            {
+                "type": "message",
+                "data": json.dumps({"cache_keys": ["spend:key:a", "spend:key:b"], "new_value": 0.0, "ttl": 60}),
+            }
+        ]
+    )
+    subscriber = AuthCacheInvalidationSubscriber(
+        redis_cache=_FakeRedisCache(client=_ScriptedPubSubRedisClient(pubsubs=[pubsub])),
+        user_api_key_cache=UserApiKeyCache(),
+        spend_counters=store,
+    )
+    subscriber.start()
+    try:
+        assert await asyncio.wait_for(pubsub.drained.wait(), timeout=5)
+    finally:
+        await subscriber.stop()
+
+    assert store.snapshot() == {"spend:key:a": 0.0, "spend:key:b": 0.0}
+
+
 @pytest.mark.asyncio
 async def test_subscriber_writes_and_drops_the_native_spend_counter_copies_a_broadcast_names() -> None:
     """The spend counters' memory tier lives in the native store, not in a Python InMemoryCache, so a broadcast
diff --git a/tests/unit/proxy/common_utils/test_reset_budget_job.py b/tests/unit/proxy/common_utils/test_reset_budget_job.py
index 4a4490afc33..92c1b7c774a 100644
--- a/tests/unit/proxy/common_utils/test_reset_budget_job.py
+++ b/tests/unit/proxy/common_utils/test_reset_budget_job.py
@@ -4812,3 +4812,29 @@ async def test_reset_budget_for_litellm_team_members_called():
     assert len(team_member_writes) == 1
     assert team_member_writes[0]["where"]["budget_id"]["in"] == ["budget1"]
     assert team_member_writes[0]["data"] == {"spend": 0}
+
+
+@pytest.mark.asyncio
+async def test_reset_expired_window_writes_the_redis_counter_with_the_spend_counter_ttl():
+    """The window reset is a counter write like every other, so it must carry the spend counter TTL, not the 60s cache default."""
+    from datetime import datetime
+
+    from litellm.proxy.common_utils.reset_budget_job import BudgetResetSettings, Litellm_EntityType
+
+    spend = FakeSpendCounters(counter_ttl=4321)
+    window = {"budget_duration": "1d", "max_budget": 1.0, "reset_at": "2026-01-01T00:00:00Z"}
+
+    reset = await ResetBudgetJob._reset_expired_window(
+        window=window,
+        counter_key="spend:key:abc:window:1d",
+        spend_counter_store=spend.store(),
+        now=datetime(2026, 1, 2),
+        reset_settings=BudgetResetSettings(),
+        prisma_client=AsyncMock(),
+        entity_type=Litellm_EntityType.KEY,
+        entity_id="abc",
+    )
+
+    assert reset is True
+    assert spend.commands[-1] == "SET spend:key:abc:window:1d 0.0 4321"
+    assert spend.memory == {"spend:key:abc:window:1d": 0.0}
diff --git a/tests/unit/proxy/management_endpoints/test_key_management_endpoints.py b/tests/unit/proxy/management_endpoints/test_key_management_endpoints.py
index 77dc6eddf51..ae4f3f98595 100644
--- a/tests/unit/proxy/management_endpoints/test_key_management_endpoints.py
+++ b/tests/unit/proxy/management_endpoints/test_key_management_endpoints.py
@@ -8783,7 +8783,8 @@ async def test_reset_key_spend_resets_budget_windows(monkeypatch):
 
     window_counter_key = f"spend:key:{hashed_key}:window:1d"
     assert spend.memory[window_counter_key] == 0.0
-    assert f"SET {window_counter_key} 0.0 60" in spend.commands
+    assert spend.memory_ttls[window_counter_key] == 60
+    assert f"SET {window_counter_key} 0.0 {spend.counter_ttl}" in spend.commands
     mock_spend_counter_cache.in_memory_cache.set_cache.assert_any_call(
         key=f"spend_db_floor:{window_counter_key}", value=0.0, ttl=5
     )
@@ -8997,7 +8998,8 @@ async def test_update_key_spend_updates_counter(monkeypatch):
 
         mock_delete_cache.assert_awaited_once()
         assert spend.memory == {f"spend:key:{hashed_key}": 0.0}
-        assert spend.commands == [f"SET spend:key:{hashed_key} 0.0 60"]
+        assert spend.memory_ttls == {f"spend:key:{hashed_key}": 60}
+        assert spend.commands == [f"SET spend:key:{hashed_key} 0.0 {spend.counter_ttl}"]
 
 
 @pytest.mark.asyncio
diff --git a/tests/unit/proxy/management_endpoints/test_organization_endpoints.py b/tests/unit/proxy/management_endpoints/test_organization_endpoints.py
index 8d2c6c0054c..8326d6d92dd 100644
--- a/tests/unit/proxy/management_endpoints/test_organization_endpoints.py
+++ b/tests/unit/proxy/management_endpoints/test_organization_endpoints.py
@@ -3,7 +3,7 @@ import json
 from contextlib import asynccontextmanager
 from types import MappingProxyType, SimpleNamespace
 from typing import Final, Mapping, Optional, cast
-from unittest.mock import AsyncMock, MagicMock, patch
+from unittest.mock import AsyncMock, MagicMock, call, patch
 
 import pytest
 from fastapi import HTTPException
@@ -14,6 +14,7 @@ from tests.unit.proxy.management_endpoints.jwt_key_mapping_doubles import (
     CascadingJWTMappingTable,
     JWTMappingRow,
 )
+from tests.unit.redis.stores.spend_counters_double import FakeSpendCounters
 
 
 @pytest.mark.asyncio
@@ -648,6 +649,7 @@ async def test_organization_member_add_budget_omission_and_null_leave_budget_uns
     from litellm.proxy.management_endpoints.organization_endpoints import organization_member_add
 
     user = LiteLLM_UserTable(user_id="user-1", user_role="internal_user")
+
     async def create_membership(data):
         return LiteLLM_OrganizationMembershipTable(
             user_id="user-1",
@@ -1582,6 +1584,92 @@ async def test_delete_organization_evicts_the_cache_of_the_keys_it_deletes(monke
     assert jwt_table.rows == (kept_row,)
 
 
+def _org_spend_counter_cache(
+    monkeypatch: pytest.MonkeyPatch, *, lost_write: Exception | None = None, failing: frozenset[str] = frozenset()
+) -> tuple[MagicMock, FakeSpendCounters]:
+    from litellm.caching.in_memory_cache import InMemoryCache
+
+    spend = FakeSpendCounters(memory={"spend:org:org-1": 4.2}, failing=failing)
+    monkeypatch.setattr("litellm.proxy.proxy_server.spend_counter_store", spend.store())
+    spend_counter_cache = MagicMock()
+    spend_counter_cache.in_memory_cache = InMemoryCache()
+    spend_counter_cache.in_memory_cache.set_cache(key="spend_db_floor:spend:org:org-1", value=4.2)
+    spend_counter_cache.redis_cache.reset_fence_key = lambda key: f"{{{key}}}:reset_fence"
+    spend_counter_cache.redis_cache.async_set_cache_pipeline_with_ttls = AsyncMock(return_value=lost_write)
+    monkeypatch.setattr("litellm.proxy.proxy_server.spend_counter_cache", spend_counter_cache)
+    monkeypatch.setattr("litellm.proxy.proxy_server.publish_auth_cache_invalidations", AsyncMock())
+    return spend_counter_cache, spend
+
+
+@pytest.mark.asyncio
+async def test_legacy_update_with_spend_sets_the_org_counter_and_its_floor_on_every_pod(monkeypatch):
+    """A direct spend write must SET the cross-pod counter and its floor marker: a pod that cached the old floor
+    would otherwise repair a deleted-and-reseeded counter back up, and the org stays at the stale value until
+    the counter expires."""
+    from litellm.proxy import proxy_server
+
+    spend_counter_cache, spend = _org_spend_counter_cache(monkeypatch)
+
+    await _run_legacy_update_organization(
+        monkeypatch, body={"organization_id": "org-1", "spend": 1.5}, existing_budget_id="budget-1"
+    )
+
+    spend_counter_cache.redis_cache.async_set_cache_pipeline_with_ttls.assert_awaited_once_with(
+        (("{spend:org:org-1}:reset_fence", 1, proxy_server.SPEND_RESET_FENCE_TTL_SECONDS),)
+    )
+    assert spend.commands == [f"SET spend:org:org-1 1.5 {spend.counter_ttl}"]
+    assert proxy_server.spend_counter_store.get_local("spend:org:org-1") == 1.5
+    assert spend_counter_cache.in_memory_cache.get_cache(key="spend_db_floor:spend:org:org-1") == 1.5
+    assert proxy_server.publish_auth_cache_invalidations.await_args_list == [
+        call(("spend_db_floor:spend:org:org-1",), new_value=1.5, ttl=proxy_server.SPEND_DB_FLOOR_CACHE_TTL_SECONDS),
+        call(("spend:org:org-1",), new_value=1.5, ttl=60),
+    ]
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("lost", ["fence", "counter"])
+async def test_legacy_update_with_spend_answers_500_when_the_redis_counter_write_is_lost(monkeypatch, lost):
+    """The row is saved either way, but a lost counter write leaves the other pods enforcing the old spend
+    for up to the counter TTL, so the admin hears about it and retries instead of reading success. The fence and
+    the counter go through two Redis clients, and losing either one is a lost reset."""
+    from redis.exceptions import ConnectionError as RedisConnectionError
+
+    from litellm.proxy import proxy_server
+    from litellm.proxy._types import ProxyException
+
+    _org_spend_counter_cache(
+        monkeypatch,
+        lost_write=RedisConnectionError("redis down") if lost == "fence" else None,
+        failing=frozenset({"set"}) if lost == "counter" else frozenset(),
+    )
+
+    with pytest.raises(ProxyException) as raised:
+        await _run_legacy_update_organization(
+            monkeypatch, body={"organization_id": "org-1", "spend": 1.5}, existing_budget_id="budget-1"
+        )
+
+    assert raised.value.code == "500"
+    assert raised.value.message.startswith("The organization spend was saved, but the cached spend counters")
+    proxy_server.prisma_client.db.litellm_organizationtable.update.assert_awaited_once()
+    assert proxy_server.spend_counter_store.get_local("spend:org:org-1") == 1.5
+    assert proxy_server.publish_auth_cache_invalidations.await_count == 2
+
+
+@pytest.mark.asyncio
+async def test_legacy_update_without_spend_keeps_the_org_spend_counter(monkeypatch):
+    spend_counter_cache, spend = _org_spend_counter_cache(monkeypatch)
+
+    await _run_legacy_update_organization(
+        monkeypatch, body={"organization_id": "org-1", "organization_alias": "renamed"}, existing_budget_id="budget-1"
+    )
+
+    from litellm.proxy import proxy_server
+
+    spend_counter_cache.redis_cache.async_set_cache_pipeline_with_ttls.assert_not_awaited()
+    assert spend.commands == []
+    assert proxy_server.spend_counter_store.get_local("spend:org:org-1") == 4.2
+
+
 @pytest.mark.asyncio
 async def test_delete_organization_is_refused_while_one_of_its_teams_holds_a_ptu_share(monkeypatch):
     """Deleting an organization deletes its teams, so a team still holding a PTU share stops it the
diff --git a/tests/unit/proxy/proxy_server/test_spend_counters.py b/tests/unit/proxy/proxy_server/test_spend_counters.py
index 19db80b8930..179b14beae7 100644
--- a/tests/unit/proxy/proxy_server/test_spend_counters.py
+++ b/tests/unit/proxy/proxy_server/test_spend_counters.py
@@ -44,6 +44,7 @@ from litellm.proxy.common_utils.user_api_key_cache import UserApiKeyCache, end_u
 from litellm.proxy.management_endpoints.team_endpoints import refresh_cached_team
 
 from .conftest import normalize
+from litellm.redis.stores.spend_counters import SpendCounterStore
 from litellm.rust_bridge._native import NativeRedisStoreError
 from tests.unit.redis.stores.auth_cache_double import FakeAuthCache, shared_cache
 from tests.unit.redis.stores.spend_counters_double import FakeSpendCounters
@@ -697,6 +698,32 @@ async def test_increment_spend_counters_pipelines_all_scopes_in_one_redis_call(
     assert spend.memory == dict.fromkeys(expected_keys, 1.5)
 
 
+def test_spend_counter_redis_ttl_never_shortens_configured_redis_ttl(monkeypatch):
+    """Deployments that configured a longer Redis default must not see spend counters expire sooner"""
+    monkeypatch.setattr(ps.litellm, "default_redis_ttl", 86400)
+    monkeypatch.setattr(ps, "proxy_batch_write_at", 60)
+
+    assert ps.spend_counter_redis_ttl() == 86400
+
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize("batch_write_at", [60, 900])
+async def test_spend_counter_redis_ttl_outlives_db_batch_write_interval(monkeypatch, batch_write_at):
+    """A counter that expires before its buffered spend is written to the DB reseeds from a stale-low
+    row and re-admits an over-budget key, so every counter write must outlive the batch interval"""
+    spend: Final = FakeSpendCounters(redis={"spend:key:reserved": 1.0})
+    monkeypatch.setattr(ps, "spend_counter_store", SpendCounterStore(spend, ps.spend_counter_redis_ttl))
+    monkeypatch.setattr(ps, "proxy_batch_write_at", batch_write_at)
+    max_flush_delay: Final = batch_write_at + 5
+
+    await ps.increment_spend_counter_cache(counter_key="spend:key:direct", increment=0.5)
+    await ps.run_spend_counter_pipeline((ps.PendingSpendIncrement(counter_key="spend:key:batched", increment=0.5),))
+    await ps.refresh_spend_counter_ttl(counter_key="spend:key:reserved")
+
+    assert set(spend.ttls) == {"spend:key:direct", "spend:key:batched", "spend:key:reserved"}
+    assert all(ttl is not None and ttl > max_flush_delay for ttl in spend.ttls.values())
+
+
 _PENDING_SPEND_COUNTER_KEYS: tuple[str, ...] = (
     "spend:key:hashed",
     "spend:team:team-1",
@@ -1331,6 +1358,14 @@ async def test_update_cache_user_cache_failure_invalid_state_is_swallowed(monkey
     assert result is None
 
 
+@pytest.mark.parametrize(("max_batch_size", "keys_per_pipeline"), [(1, 1), (2, 1), (3, 1), (1000, 500)])
+def test_a_reset_pipeline_takes_half_the_redis_batch_size_and_never_less_than_one_key(
+    max_batch_size: int, keys_per_pipeline: int
+) -> None:
+    """Each key rides with its fence, so half the batch size; a step of zero would make every reset raise."""
+    assert ps._keys_per_reset_pipeline(max_batch_size) == keys_per_pipeline
+
+
 async def _drain_spend_cache_writes() -> None:
     for _ in range(3):
         await asyncio.sleep(0)
diff --git a/tests/unit/proxy/spend_tracking/test_spend_management_endpoints.py b/tests/unit/proxy/spend_tracking/test_spend_management_endpoints.py
index c3e916d581d..4691df6777c 100644
--- a/tests/unit/proxy/spend_tracking/test_spend_management_endpoints.py
+++ b/tests/unit/proxy/spend_tracking/test_spend_management_endpoints.py
@@ -5,10 +5,11 @@ import hashlib
 import json
 import re
 import sqlite3
-from collections.abc import Mapping, Sequence
+from collections.abc import AsyncIterator, Mapping, Sequence
+from contextlib import asynccontextmanager
 from datetime import timezone
 from typing import Final, Literal
-from unittest.mock import AsyncMock, MagicMock, patch
+from unittest.mock import AsyncMock, MagicMock, call, patch
 
 import prisma
 import pytest
@@ -20,6 +21,7 @@ import litellm.proxy.proxy_server as ps
 from litellm.proxy.auth.authorization import OwnedRows
 from litellm.proxy.auth.authorization_dependencies import get_log_team_lookup, load_permitted_log_team_ids
 from litellm.proxy.auth.route_checks import RouteChecks
+from tests.unit.redis.stores.spend_counters_double import FakeSpendCounters
 from tests.unit.proxy.db.fake_prisma_engine import (
     ReadTargetOf,
     statement_timeout_error,
@@ -8336,6 +8338,187 @@ async def test_global_spend_refresh_runs_the_refresh_on_the_writer_when_a_reader
     ]
 
 
+def _spend_counter_cache_for_reset(
+    monkeypatch: pytest.MonkeyPatch,
+    *,
+    scan_results: object,
+    lost_write: Exception | None = None,
+    failing: frozenset[str] = frozenset(),
+) -> tuple[MagicMock, FakeSpendCounters]:
+    from litellm.caching.in_memory_cache import InMemoryCache
+
+    mock_prisma_client: Final = MagicMock()
+    mock_prisma_client.db.query_raw = AsyncMock()
+    mock_prisma_client.db.litellm_verificationtoken.update_many = AsyncMock()
+    mock_prisma_client.db.litellm_teamtable.update_many = AsyncMock()
+
+    @asynccontextmanager
+    async def transaction() -> AsyncIterator[MagicMock]:
+        yield mock_prisma_client.db
+
+    mock_prisma_client.tx = transaction
+    monkeypatch.setattr(ps, "prisma_client", mock_prisma_client)
+    spend: Final = FakeSpendCounters(
+        memory={"spend:key:aaa": 0.5, "spend:key:aaa:window:1d": 0.3, "spend:team:t1": 0.5, "spend:user:u1": 0.5},
+        failing=failing,
+    )
+    monkeypatch.setattr(ps, "spend_counter_store", spend.store())
+    spend_counter_cache: Final = MagicMock()
+    spend_counter_cache.in_memory_cache = InMemoryCache()
+    spend_counter_cache.in_memory_cache.set_cache(key="spend_db_floor:spend:key:aaa", value=0.5)
+    spend_counter_cache.in_memory_cache.set_cache(key="spend_db_floor:spend:key:floored", value=0.9)
+    spend_counter_cache.redis_cache.namespace = "ns"
+    spend_counter_cache.redis_cache.reset_fence_key = lambda key: f"{{ns:{key}}}:reset_fence"
+    spend_counter_cache.redis_cache.async_scan_iter = AsyncMock(side_effect=scan_results)
+    spend_counter_cache.redis_cache.async_set_cache_pipeline_with_ttls = AsyncMock(return_value=lost_write)
+    monkeypatch.setattr(ps, "spend_counter_cache", spend_counter_cache)
+    monkeypatch.setattr(ps, "publish_auth_cache_invalidations", AsyncMock())
+    return spend_counter_cache, spend
+
+
+_RESET_KEY_COUNTERS: Final = ("spend:key:aaa", "spend:key:bbb", "spend:key:floored")
+_RESET_TEAM_COUNTERS: Final = ("spend:team:sales:window:east", "spend:team:t1")
+
+
+def _reset_fences(counters: tuple[str, ...]) -> tuple[tuple[str, int, int], ...]:
+    return tuple((f"{{ns:{counter}}}:reset_fence", 1, ps.SPEND_RESET_FENCE_TTL_SECONDS) for counter in counters)
+
+
+def _reset_writes(spend: FakeSpendCounters, counters: tuple[str, ...]) -> list[str]:
+    return [f"SET {counter} 0.0 {spend.counter_ttl}" for counter in counters]
+
+
+def _reset_broadcasts(counters: tuple[str, ...]) -> tuple[object, object]:
+    """The floors go out first: a subscriber that applied the new counter under the old floor would repair it."""
+    return (
+        call(
+            tuple(f"spend_db_floor:{counter}" for counter in counters),
+            new_value=0.0,
+            ttl=ps.SPEND_DB_FLOOR_CACHE_TTL_SECONDS,
+        ),
+        call(counters, new_value=0.0, ttl=60),
+    )
+
+
+@pytest.mark.asyncio
+async def test_global_spend_reset_sets_every_key_and_team_counter_and_its_floor_to_zero(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """Deleting the counters is not enough: a pod that cached the pre-reset floor within the last 5s would repair
+    the reseeded counter back to the old total for the whole counter TTL, so the reset SETs counter and floor
+    everywhere, fences each counter against that repair, and leaves budget-window counters, which the reset
+    does not touch in the DB, alone. A window counter is told by its trailing duration, so a team whose id
+    merely contains ``:window:`` is still reset."""
+    spend_counter_cache, spend = _spend_counter_cache_for_reset(
+        monkeypatch,
+        scan_results=[
+            ["ns:spend:key:aaa", "ns:spend:key:bbb", "ns:spend:key:bbb:window:1d"],
+            ["ns:spend:team:t1", "ns:spend:team:t1:window:1d", "ns:spend:team:sales:window:east"],
+        ],
+    )
+
+    response: Final = await spend_management_endpoints.global_spend_reset()
+
+    assert response["status"] == "success"
+    assert [c.kwargs for c in spend_counter_cache.redis_cache.async_scan_iter.await_args_list] == [
+        {"pattern": "spend:key:", "count": 500, "unbounded": True},
+        {"pattern": "spend:team:", "count": 500, "unbounded": True},
+    ]
+    assert [c.args for c in spend_counter_cache.redis_cache.async_set_cache_pipeline_with_ttls.await_args_list] == [
+        (_reset_fences(_RESET_KEY_COUNTERS),),
+        (_reset_fences(_RESET_TEAM_COUNTERS),),
+    ]
+    assert spend.commands == [*_reset_writes(spend, _RESET_KEY_COUNTERS), *_reset_writes(spend, _RESET_TEAM_COUNTERS)]
+    in_memory: Final = spend_counter_cache.in_memory_cache
+    reset_counters: Final = (*_RESET_KEY_COUNTERS, *_RESET_TEAM_COUNTERS)
+    assert [ps.spend_counter_store.get_local(counter) for counter in reset_counters] == [0.0] * 5
+    assert [in_memory.get_cache(key=f"spend_db_floor:{counter}") for counter in reset_counters] == [0.0] * 5
+    assert ps.spend_counter_store.get_local("spend:key:aaa:window:1d") == 0.3
+    assert ps.spend_counter_store.get_local("spend:team:t1:window:1d") is None
+    assert ps.spend_counter_store.get_local("spend:user:u1") == 0.5
+    assert ps.publish_auth_cache_invalidations.await_args_list == [
+        *_reset_broadcasts(_RESET_KEY_COUNTERS),
+        *_reset_broadcasts(_RESET_TEAM_COUNTERS),
+    ]
+
+
+@pytest.mark.asyncio
+async def test_global_spend_reset_answers_500_after_resetting_the_rows_and_this_pod_when_redis_cannot_be_listed(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """The counters Redis holds for the other pods stay at the old spend for the whole counter TTL when the
+    scan fails, so the reset says so instead of reporting success, after resetting what this pod knows."""
+    spend_counter_cache, spend = _spend_counter_cache_for_reset(monkeypatch, scan_results=ConnectionError("redis down"))
+
+    with pytest.raises(ProxyException) as raised:
+        await spend_management_endpoints.global_spend_reset()
+
+    assert raised.value.code == "500"
+    assert "retry this request once Redis accepts writes" in raised.value.message
+    ps.prisma_client.db.litellm_verificationtoken.update_many.assert_awaited_once_with(data={"spend": 0.0}, where={})
+    ps.prisma_client.db.litellm_teamtable.update_many.assert_awaited_once_with(data={"spend": 0.0}, where={})
+    assert [c.args for c in spend_counter_cache.redis_cache.async_set_cache_pipeline_with_ttls.await_args_list] == [
+        (_reset_fences(("spend:key:aaa", "spend:key:floored")),),
+        (_reset_fences(("spend:team:t1",)),),
+    ]
+    assert spend.commands == [
+        *_reset_writes(spend, ("spend:key:aaa", "spend:key:floored")),
+        *_reset_writes(spend, ("spend:team:t1",)),
+    ]
+    assert ps.spend_counter_store.get_local("spend:key:aaa") == 0.0
+    assert spend_counter_cache.in_memory_cache.get_cache(key="spend_db_floor:spend:key:floored") == 0.0
+
+
+@pytest.mark.asyncio
+async def test_global_spend_reset_answers_500_when_the_redis_counter_write_is_lost(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """A lost pipeline leaves the other pods on the old counters for up to the counter TTL, so the reset still
+    resets the teams, this pod, and the broadcast, then reports the loss so the admin retries."""
+    from redis.exceptions import ConnectionError as RedisConnectionError
+
+    spend_counter_cache, spend = _spend_counter_cache_for_reset(
+        monkeypatch,
+        scan_results=[["ns:spend:key:aaa"], ["ns:spend:team:t1"]],
+        lost_write=RedisConnectionError("redis down"),
+    )
+
+    with pytest.raises(ProxyException) as raised:
+        await spend_management_endpoints.global_spend_reset()
+
+    assert raised.value.code == "500"
+    assert raised.value.message.startswith("Spend was reset, but the cached spend counters could not be reset in Redis")
+    assert "redis down" in raised.value.message
+    assert spend_counter_cache.redis_cache.async_set_cache_pipeline_with_ttls.await_count == 2
+    assert spend.commands == []
+    assert ps.spend_counter_store.get_local("spend:team:t1") == 0.0
+    assert ps.publish_auth_cache_invalidations.await_args_list == [
+        *_reset_broadcasts(("spend:key:aaa", "spend:key:floored")),
+        *_reset_broadcasts(("spend:team:t1",)),
+    ]
+
+
+@pytest.mark.asyncio
+async def test_global_spend_reset_answers_500_while_the_spend_counter_store_refuses_writes(
+    monkeypatch: pytest.MonkeyPatch,
+) -> None:
+    """The fences and the counters go through two Redis clients with their own circuit breakers. A reset that
+    read as written while the counter store still refused writes would drop the next request's increment, so the
+    retry has to keep answering 500 until the store every request increments accepts the reset."""
+    spend_counter_cache, spend = _spend_counter_cache_for_reset(
+        monkeypatch, scan_results=[["ns:spend:key:aaa"], ["ns:spend:team:t1"]], failing=frozenset({"set"})
+    )
+
+    with pytest.raises(ProxyException) as raised:
+        await spend_management_endpoints.global_spend_reset()
+
+    assert raised.value.code == "500"
+    assert raised.value.message.startswith("Spend was reset, but the cached spend counters could not be reset in Redis")
+    assert spend_counter_cache.redis_cache.async_set_cache_pipeline_with_ttls.await_count == 2
+    assert ps.spend_counter_store.get_local("spend:key:aaa") == 0.0
+    assert ps.spend_counter_store.get_local("spend:team:t1") == 0.0
+
+
 def test_spend_calculate_rejection_body_is_openai_shaped(client):
     app.dependency_overrides[ps.user_api_key_auth] = lambda: UserAPIKeyAuth(
         user_role=LitellmUserRoles.PROXY_ADMIN, user_id="admin_user", api_key="hashed-k"
diff --git a/tests/unit/proxy/test_budget_reservation.py b/tests/unit/proxy/test_budget_reservation.py
index 57a07153ca1..e13036e74fd 100644
--- a/tests/unit/proxy/test_budget_reservation.py
+++ b/tests/unit/proxy/test_budget_reservation.py
@@ -40,6 +40,7 @@ from litellm.proxy.common_utils.user_api_key_cache import (
 )
 from litellm.proxy.spend_tracking.budget_reservation import (
     _get_model_access_group_budget_counters,
+    _lease_renewals,
     estimate_request_max_cost,
     get_budget_window_start,
     invalidate_budget_reservation_counters,
@@ -2204,7 +2205,7 @@ class _ExpiringSpendCounters(FakeSpendCounters):
         self.refresh_count = 0
         self.fail_first_refresh = fail_first_refresh
 
-    def refresh_ttl(self, counter: str) -> asyncio.Future[bool]:
+    def refresh_ttl(self, counter: str, ttl_seconds: float | None = None) -> asyncio.Future[bool]:
         self.refresh_attempts += 1
         future: asyncio.Future[bool] = asyncio.get_running_loop().create_future()
         redis = self.redis
@@ -2259,6 +2260,26 @@ async def test_reservation_survives_redis_counter_ttl_while_request_in_flight(
     assert redis_cache.redis.get(counter_key) is None
 
 
+@pytest.mark.asyncio
+async def test_reservation_lease_renewal_stops_promptly_with_long_spend_counter_ttl(
+    spend_counter_state,
+):
+    """A long spend-counter TTL must not stretch how often renewal checks for completion, or finished
+    requests keep their renewal tasks alive for half that TTL"""
+    counter_cache, key_cache = spend_counter_state
+    _install(_ExpiringSpendCounters(ttl=0.2))
+    proxy_logging_obj = ProxyLogging(user_api_key_cache=key_cache)
+    valid_token = UserAPIKeyAuth(token="key-lease-long-ttl", spend=0.0, max_budget=1.0)
+
+    reservation = await _reserve(valid_token, 0.6, key_cache, proxy_logging_obj)
+    assert reservation is not None
+    assert len(_lease_renewals) == 1
+
+    await release_budget_reservation(reservation)
+    await asyncio.sleep(0.3)
+    assert len(_lease_renewals) == 0
+
+
 @pytest.mark.asyncio
 async def test_reservation_lease_keeps_renewing_after_transient_redis_failure(
     spend_counter_state,
diff --git a/tests/unit/proxy/test_proxy_server_endpoints_and_startup.py b/tests/unit/proxy/test_proxy_server_endpoints_and_startup.py
index 1cfb14e6bf9..776b831d0cb 100644
--- a/tests/unit/proxy/test_proxy_server_endpoints_and_startup.py
+++ b/tests/unit/proxy/test_proxy_server_endpoints_and_startup.py
@@ -9278,7 +9278,9 @@ async def test_window_spend_counter_seed_asks_the_store_to_increment_a_lost_seed
     seeds: list[tuple[str, float, bool]] = []
 
     class RecordingSeeds(FakeSpendCounters):
-        def seed(self, counter: str, spend: float, *, increment_if_lost: bool) -> asyncio.Future[float]:
+        def seed(
+            self, counter: str, spend: float, *, increment_if_lost: bool, ttl_seconds: float | None = None
+        ) -> asyncio.Future[float]:
             seeds.append((counter, spend, increment_if_lost))
             return super().seed(counter, spend, increment_if_lost=increment_if_lost)
 
diff --git a/tests/unit/redis/stores/spend_counters_double.py b/tests/unit/redis/stores/spend_counters_double.py
index 1f3c4b94d45..4871795eb52 100644
--- a/tests/unit/redis/stores/spend_counters_double.py
+++ b/tests/unit/redis/stores/spend_counters_double.py
@@ -57,7 +57,8 @@ class DeclaredRead:
 class FakeSpendCounters:
     """``redis`` is None for a worker without Redis, and ``redis_default`` answers reads of a key it lacks. ``fail``
     makes every Redis call fail with ``failure``, ``fail_pipelines`` only the increment pipelines and ``failing`` only
-    the named writes ("set", "delete")."""
+    the named writes ("set", "delete"). ``counter_ttl`` is what the store gives each Redis write, ``ttls`` the last one
+    each counter's write carried and ``memory_ttls`` the last memory TTL of a ``set``."""
 
     redis: dict[str, object] | None = field(default_factory=dict)
     memory: dict[str, float] = field(default_factory=dict)
@@ -68,6 +69,9 @@ class FakeSpendCounters:
     failure: str = "transport"
     redis_default: float | None = None
     redis_ttl: float = 60
+    counter_ttl: float = 3600
+    ttls: dict[str, float | None] = field(default_factory=dict)
+    memory_ttls: dict[str, float | None] = field(default_factory=dict)
     batch_reads: bool = True
     read_hook: Callable[[str], Awaitable[None]] | None = None
     on_delete: Callable[[tuple[str, ...]], None] | None = None
@@ -76,7 +80,7 @@ class FakeSpendCounters:
     declared: list[DeclaredRead] = field(default_factory=list)
 
     def store(self) -> SpendCounterStore:
-        return SpendCounterStore(self)
+        return SpendCounterStore(self, lambda: self.counter_ttl)
 
     @property
     def has_redis(self) -> bool:
@@ -121,7 +125,7 @@ class FakeSpendCounters:
             events.append("declare spend_counters")
         return declared
 
-    def increment(self, counter: str, amount: float) -> asyncio.Future[float]:
+    def increment(self, counter: str, amount: float, ttl_seconds: float | None = None) -> asyncio.Future[float]:
         _check(counter)
         if self.redis is None:
             return _done(self.increment_local(counter, amount))
@@ -129,19 +133,26 @@ class FakeSpendCounters:
             self.memory.pop(counter, None)
             return _failed(unavailable(self.failure))
         self.commands.append(f"INCRBYFLOAT {counter} {amount}")
+        self.ttls[counter] = ttl_seconds
         return _done(self._incr(counter, amount))
 
-    def increment_many(self, increments: Sequence[SpendIncrement]) -> asyncio.Future[Sequence[float]]:
+    def increment_many(
+        self, increments: Sequence[SpendIncrement], ttl_seconds: float | None = None
+    ) -> asyncio.Future[Sequence[float]]:
         if self.redis is None:
             return _done([self.increment_local(counter, amount) for counter, amount in increments])
         if self.fail or self.fail_pipelines:
             return _failed(unavailable(self.failure))
         self.commands.append(f"PIPELINE {' '.join(counter for counter, _ in increments)}")
+        self.ttls.update(dict.fromkeys((counter for counter, _ in increments), ttl_seconds))
         return _done([self._incr(counter, amount) for counter, amount in increments])
 
-    def increment_many_post_call(self, request: object, increments: Sequence[SpendIncrement]) -> bool:
+    def increment_many_post_call(
+        self, request: object, increments: Sequence[SpendIncrement], ttl_seconds: float | None = None
+    ) -> bool:
         if self.redis is None:
             return False
+        self.ttls.update(dict.fromkeys((counter for counter, _ in increments), ttl_seconds))
         self.post_call.append((request, tuple(increments)))
         return True
 
@@ -158,7 +169,7 @@ class FakeSpendCounters:
             for counter, amount in increments:
                 self._incr(counter, amount)
 
-    def set_max(self, counter: str, spend: float) -> asyncio.Future[float | None]:
+    def set_max(self, counter: str, spend: float, ttl_seconds: float | None = None) -> asyncio.Future[float | None]:
         _check(counter)
         if self.memory.get(counter) is None or self.memory[counter] < spend:
             self.memory[counter] = spend
@@ -168,11 +179,14 @@ class FakeSpendCounters:
             return _failed(unavailable(self.failure))
         self.commands.append(f"SETMAX {counter} {spend}")
         current: Final = self.redis.get(counter)
+        self.ttls[counter] = ttl_seconds
         if current is None or current < spend:
             self.redis[counter] = spend
         return _done(float(self.redis[counter]))
 
-    def seed(self, counter: str, spend: float, *, increment_if_lost: bool) -> asyncio.Future[float]:
+    def seed(
+        self, counter: str, spend: float, *, increment_if_lost: bool, ttl_seconds: float | None = None
+    ) -> asyncio.Future[float]:
         _check(counter)
         if self.redis is None:
             cached: Final = self.memory.get(counter)
@@ -182,18 +196,27 @@ class FakeSpendCounters:
         if self.fail:
             return _failed(unavailable(self.failure))
         self.commands.append(f"SETNX {counter} {spend}")
+        self.ttls[counter] = ttl_seconds
         current: Final = self.redis.setdefault(counter, spend)
         self.memory[counter] = float(current)
         return _done(float(current))
 
-    def set(self, counter: str, spend: float, ttl_seconds: float | None = None) -> asyncio.Future[None]:
+    def set(
+        self,
+        counter: str,
+        spend: float,
+        memory_ttl_seconds: float | None = None,
+        redis_ttl_seconds: float | None = None,
+    ) -> asyncio.Future[None]:
         _check(counter)
         self.memory[counter] = spend
+        self.memory_ttls[counter] = memory_ttl_seconds
         if self.redis is None:
             return _done(None)
         if self.fail or "set" in self.failing:
             return _failed(unavailable(self.failure))
-        self.commands.append(f"SET {counter} {spend} {ttl_seconds}")
+        self.commands.append(f"SET {counter} {spend} {redis_ttl_seconds}")
+        self.ttls[counter] = redis_ttl_seconds
         self.redis[counter] = spend
         return _done(None)
 
@@ -217,13 +240,14 @@ class FakeSpendCounters:
             self.redis.pop(counter, None)
         return _done(None)
 
-    def refresh_ttl(self, counter: str) -> asyncio.Future[bool]:
+    def refresh_ttl(self, counter: str, ttl_seconds: float | None = None) -> asyncio.Future[bool]:
         _check(counter)
         if self.redis is None:
             return _done(False)
         if self.fail:
             return _failed(unavailable(self.failure))
         self.commands.append(f"EXPIRE {counter}")
+        self.ttls[counter] = ttl_seconds
         return _done(counter in self.redis)
 
     def get_local(self, counter: str) -> float | None:
diff --git a/tests/unit/redis/stores/test_spend_counters.py b/tests/unit/redis/stores/test_spend_counters.py
index c54dc6cc81e..cfde8570af7 100644
--- a/tests/unit/redis/stores/test_spend_counters.py
+++ b/tests/unit/redis/stores/test_spend_counters.py
@@ -103,6 +103,67 @@ async def test_without_redis_the_native_store_counts_and_answers_from_memory() -
     assert not store.increment_many_post_call((("spend:key:k", 1.0),))
 
 
+@pytest.mark.asyncio
+async def test_every_redis_write_takes_the_counter_ttl_as_it_stands_when_it_is_written() -> None:
+    """The settings the TTL depends on load after the store is built, so a TTL read once would go stale."""
+    spend: Final = FakeSpendCounters(redis={"spend:key:refreshed": 1.0})
+    store: Final = spend.store()
+
+    spend.counter_ttl = 101
+    await store.increment("spend:key:incremented", 1.0)
+    spend.counter_ttl = 102
+    await store.increment_many((("spend:key:piped", 1.0),))
+    spend.counter_ttl = 103
+    await store.set_max("spend:key:repaired", 1.0)
+    spend.counter_ttl = 104
+    await store.seed("spend:key:seeded", 1.0, increment_if_lost=False)
+    spend.counter_ttl = 105
+    await store.set("spend:key:reset", 1.0, memory_ttl=60)
+    spend.counter_ttl = 106
+    await store.refresh_ttl("spend:key:refreshed")
+    spend.counter_ttl = 107
+    natives: Final = FakeNatives()
+    with request_redis_batch_scope(native_factory=natives, native_send_factory=fake_send):  # pyright: ignore[reportArgumentType]  # test double
+        store.increment_many_post_call((("spend:key:post_call", 1.0),))
+
+    assert spend.ttls == {
+        "spend:key:incremented": 101,
+        "spend:key:piped": 102,
+        "spend:key:repaired": 103,
+        "spend:key:seeded": 104,
+        "spend:key:reset": 105,
+        "spend:key:refreshed": 106,
+        "spend:key:post_call": 107,
+    }
+    assert spend.memory_ttls == {"spend:key:reset": 60}
+
+
+@pytest.mark.asyncio
+async def test_a_store_without_a_counter_ttl_leaves_each_write_on_the_redis_clients_default() -> None:
+    spend: Final = FakeSpendCounters()
+
+    await SpendCounterStore(spend).increment("spend:key:k", 1.0)
+
+    assert spend.ttls == {"spend:key:k": None}
+
+
+@pytest.mark.parametrize(
+    ("namespace", "fence", "sent"),
+    [
+        (None, "{spend:team:t}:reset_fence", "{spend:team:t}:reset_fence"),
+        ("litellm", "{litellm:spend:team:t}:reset_fence", "litellm:{litellm:spend:team:t}:reset_fence"),
+    ],
+)
+def test_redis_cache_writes_the_reset_fence_the_native_store_checks(namespace: str | None, fence: str, sent: str) -> None:
+    """Mirrors ``reset_fence_key`` in the crate's ``keys.rs``, and ``a_reset_fence_holds_a_repair_until_it_is_gone``
+    checks the same bytes against real Redis."""
+    cache: Final = RedisCache.__new__(RedisCache)
+    cache.namespace = namespace
+
+    assert cache.reset_fence_key("spend:team:t") == fence
+    assert cache.check_and_fix_namespace(key=fence) == sent
+
+
 def test_a_broadcast_writes_and_drops_only_spend_counter_copies() -> None:
     store: Final = SpendCounterStore(connect(None).spend_counters())
     store.set_local("spend:key:k", 5.0)
@@ -153,9 +214,11 @@ async def test_post_call_increments_go_on_the_requests_native_post_call_batch_un
     targets: Final[list[str | None]] = []
 
     class Recording(FakeSpendCounters):
-        def increment_many_post_call(self, request: object, increments: object) -> bool:
+        def increment_many_post_call(
+            self, request: object, increments: object, ttl_seconds: float | None = None
+        ) -> bool:
             targets.append(current_service_target())
-            return super().increment_many_post_call(request, increments)  # pyright: ignore[reportArgumentType]  # recorded as given
+            return super().increment_many_post_call(request, increments, ttl_seconds)  # pyright: ignore[reportArgumentType]  # recorded as given
 
     spend: Final = Recording()
     store: Final = spend.store()