refactor(key): trim budget_limits_usage entries to current_spend

max_budget and reset_at already live on the matching budget_limits entry, so
repeating them (as budget_limit and reset_at) only invited confusion about which
copy is authoritative.

litellm/proxy/management_endpoints/key_management_endpoints.py

@@ -3608,23 +3608,16 @@ async def _budget_window_usage(
     duration: Final = window.get("budget_duration")
     if not isinstance(duration, str) or not duration:
         return None
-    max_budget: Final = _window_max_budget(window)
     spend: Final = await get_current_spend(
         counter_key=f"spend:key:{api_key_hash}:window:{duration}",
         fallback_spend=0.0,
-        max_budget=max_budget,
+        max_budget=_window_max_budget(window),
         window_entity_type="Key",
         window_entity_id=api_key_hash,
         window_duration=duration,
         window_start=get_budget_window_start(window),
     )
-    return duration, MappingProxyType(
-        {
-            "current_spend": round(spend, 4),
-            "budget_limit": max_budget,
-            "reset_at": window.get("reset_at"),
-        }
-    )
+    return duration, MappingProxyType({"current_spend": round(spend, 4)})
 
 
 async def _build_budget_limits_usage(
@@ -3771,9 +3764,9 @@ async def info_key_fn(
         - model_max_budget_usage: dict | None - Current-window spend per model, present only when
           the key has per-model budgets
         - budget_limits: list | None - Concurrent budget windows, exactly as stored
-        - budget_limits_usage: dict | None - Current-window spend per budget window, keyed by
-          budget_duration, present only when the key has budget windows (read from the same
-          cross-pod spend counter the budget enforcement uses)
+        - budget_limits_usage: dict | None - Current-window spend per budget window, e.g.
+          {"1h": {"current_spend": 0.0009}}, present only when the key has budget windows
+          (read from the same cross-pod spend counter the budget enforcement uses)
         - models: list - Model_name's the key is allowed to call
         - tpm_limit / rpm_limit: int | None - Tokens and requests per minute limits
         - metadata: dict - Metadata for the key, e.g. {"team": "core-infra"}

tests/test_litellm/proxy/management_endpoints/test_key_management_endpoints.py

@@ -14205,13 +14205,7 @@ async def test_info_key_fn_reports_budget_limits_usage(monkeypatch):
     )
 
     assert result["info"]["budget_limits"] == budget_limits
-    assert result["info"]["budget_limits_usage"] == {
-        "1h": {
-            "current_spend": 0.73,
-            "budget_limit": 2.0,
-            "reset_at": "2026-08-15T18:00:00+00:00",
-        }
-    }
+    assert result["info"]["budget_limits_usage"] == {"1h": {"current_spend": 0.73}}
 
     mock_get_current_spend.assert_awaited_once()
     call_kwargs = mock_get_current_spend.await_args.kwargs
@@ -14342,16 +14336,8 @@ async def test_info_key_fn_v2_reports_budget_limits_usage(monkeypatch):
     assert len(result["info"]) == 1
     assert result["info"][0]["budget_limits"] == budget_limits
     assert result["info"][0]["budget_limits_usage"] == {
-        "1h": {
-            "current_spend": 1.25,
-            "budget_limit": 2.0,
-            "reset_at": "2026-08-15T18:00:00+00:00",
-        },
-        "1d": {
-            "current_spend": 1.25,
-            "budget_limit": 20.0,
-            "reset_at": "2026-08-16T00:00:00+00:00",
-        },
+        "1h": {"current_spend": 1.25},
+        "1d": {"current_spend": 1.25},
     }
     assert mock_get_current_spend.await_count == 2
     counter_keys = {
@@ -14386,7 +14372,7 @@ async def test_build_budget_limits_usage_json_string_input(monkeypatch):
     )
     result = await _build_budget_limits_usage(budget_limits=raw, api_key_hash="hash-1")
 
-    assert result == {"1h": {"current_spend": 0.5, "budget_limit": 2.0, "reset_at": None}}
+    assert result == {"1h": {"current_spend": 0.5}}
     mock_get_current_spend.assert_awaited_once()
 
 
@@ -14427,7 +14413,7 @@ async def test_build_budget_limits_usage_window_without_max_budget(monkeypatch):
         budget_limits=[{"budget_duration": "2d"}], api_key_hash="hash-no-max"
     )
 
-    assert result == {"2d": {"current_spend": 0.75, "budget_limit": None, "reset_at": None}}
+    assert result == {"2d": {"current_spend": 0.75}}
     call_kwargs = mock_get_current_spend.await_args.kwargs
     assert call_kwargs["counter_key"] == "spend:key:hash-no-max:window:2d"
     assert call_kwargs["window_duration"] == "2d"
@@ -14454,7 +14440,7 @@ async def test_build_budget_limits_usage_pydantic_windows(monkeypatch):
         api_key_hash="hash-2",
     )
 
-    assert result == {"7d": {"current_spend": 1.0, "budget_limit": 10.0, "reset_at": None}}
+    assert result == {"7d": {"current_spend": 1.0}}
     call_kwargs = mock_get_current_spend.await_args.kwargs
     assert call_kwargs["counter_key"] == "spend:key:hash-2:window:7d"
     assert call_kwargs["window_duration"] == "7d"

ui/litellm-dashboard/src/lib/http/schema.d.ts

@@ -7711,9 +7711,9 @@ export interface paths {
          *         - model_max_budget_usage: dict | None - Current-window spend per model, present only when
          *           the key has per-model budgets
          *         - budget_limits: list | None - Concurrent budget windows, exactly as stored
-         *         - budget_limits_usage: dict | None - Current-window spend per budget window, keyed by
-         *           budget_duration, present only when the key has budget windows (read from the same
-         *           cross-pod spend counter the budget enforcement uses)
+         *         - budget_limits_usage: dict | None - Current-window spend per budget window, e.g.
+         *           {"1h": {"current_spend": 0.0009}}, present only when the key has budget windows
+         *           (read from the same cross-pod spend counter the budget enforcement uses)
          *         - models: list - Model_name's the key is allowed to call
          *         - tpm_limit / rpm_limit: int | None - Tokens and requests per minute limits
          *         - metadata: dict - Metadata for the key, e.g. {"team": "core-infra"}