diff --git a/ui/litellm-dashboard/src/autorouter_presets.json b/ui/litellm-dashboard/src/autorouter_presets.json
index 41107e88b8c..4cbb548a855 100644
--- a/ui/litellm-dashboard/src/autorouter_presets.json
+++ b/ui/litellm-dashboard/src/autorouter_presets.json
@@ -36,7 +36,7 @@
   },
   "lite": {
     "label": "Lite",
-    "description": "Cost-optimized routing across providers: DeepSeek V4 Flash for simple queries, Muse Spark 1.2 for medium, Kimi K3 for complex, Claude Opus 5 for reasoning-heavy requests. An LLM classifier with the agentic rubric assigns tiers.",
+    "description": "Cost-optimized routing across providers: DeepSeek V4 Flash for simple queries, Muse Spark 1.2 at xhigh for medium, Kimi K3 at max for complex, Claude Opus 5 for reasoning. An LLM classifier with the agentic rubric assigns tiers.",
     "complexity_router_config": {
       "tiers": {
         "SIMPLE": ["deepseek-v4-flash"],
@@ -44,6 +44,10 @@
         "COMPLEX": ["kimi-k3"],
         "REASONING": ["claude-opus-5"]
       },
+      "tier_model_configs": {
+        "MEDIUM": [{ "model_name": "muse-spark-1.2", "litellm_params": { "reasoning_effort": "xhigh" } }],
+        "COMPLEX": [{ "model_name": "kimi-k3", "litellm_params": { "reasoning_effort": "max" } }]
+      },
       "classifier_type": "llm",
       "classifier_llm_config": {
         "model": "deepseek-v4-flash",
diff --git a/ui/litellm-dashboard/src/lib/autorouter_presets.test.ts b/ui/litellm-dashboard/src/lib/autorouter_presets.test.ts
index 02f39c5344c..2de1ac11db2 100644
--- a/ui/litellm-dashboard/src/lib/autorouter_presets.test.ts
+++ b/ui/litellm-dashboard/src/lib/autorouter_presets.test.ts
@@ -109,6 +109,14 @@ describe("autorouter_presets", () => {
     });
   });
 
+  // Kimi K3 at max needs the map to declare max for kimi-k3, which is the commit below this one.
+  it("pins the lite preset's per-tier reasoning efforts", () => {
+    expect(getPresetByKey("lite")!.complexity_router_config.tier_model_configs).toEqual({
+      MEDIUM: [{ model_name: "muse-spark-1.2", litellm_params: { reasoning_effort: "xhigh" } }],
+      COMPLEX: [{ model_name: "kimi-k3", litellm_params: { reasoning_effort: "max" } }],
+    });
+  });
+
   // serializeTierModelConfigs filters on the tier's models, so a stray name drops silently.
   it("never names a model in tier_model_configs that its own tier does not hold", () => {
     for (const preset of getAllPresets()) {
@@ -129,6 +137,15 @@ describe("autorouter_presets", () => {
     });
   });
 
+  it("prefills the lite preset's efforts through to tier_model_params", () => {
+    const lite = getPresetByKey("lite")!;
+    const prefill = buildPresetPrefill(lite.complexity_router_config, groupsOnly(getRequiredModelsInPreset(lite)));
+    expect(prefill.complexityRouterConfig.tier_model_params).toEqual({
+      MEDIUM: { "muse-spark-1.2": { reasoning_effort: "xhigh" } },
+      COMPLEX: { "kimi-k3": { reasoning_effort: "max" } },
+    });
+  });
+
   it("pins the gemini preset to concrete model ids, never Google's hot-swapping -latest aliases", () => {
     const gemini = getPresetByKey("gemini_family")!;
     const config = gemini.complexity_router_config;