diff --git a/open-sse/config/freeModelCatalog.data.ts b/open-sse/config/freeModelCatalog.data.ts
index 7074fcb3dd..81cfb498a7 100644
--- a/open-sse/config/freeModelCatalog.data.ts
+++ b/open-sse/config/freeModelCatalog.data.ts
@@ -245,11 +245,7 @@ export const FREE_MODEL_BUDGETS: FreeModelBudget[] = [
   { provider: "kilo-gateway", modelId: "nvidia/nemotron-3-ultra-550b-a55b:free", displayName: "NVIDIA Nemotron 3 Ultra (free)", monthlyTokens: 0, creditTokens: 0, freeType: "recurring-uncapped", poolKey: "kilo-gateway-free", tos: "caution" },
   { provider: "kilo-gateway", modelId: "nvidia/nemotron-3-super-120b-a12b:free", displayName: "NVIDIA Nemotron 3 Super (free)", monthlyTokens: 0, creditTokens: 0, freeType: "recurring-uncapped", poolKey: "kilo-gateway-free", tos: "caution" },
   { provider: "kilo-gateway", modelId: "nex-agi/nex-n2-pro:free", displayName: "Nex-N2-Pro (free)", monthlyTokens: 0, creditTokens: 0, freeType: "recurring-uncapped", poolKey: "kilo-gateway-free", tos: "caution" },
-  { provider: "kiro", modelId: "auto-kiro", displayName: "Auto (Kiro picks best model)", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
-  { provider: "kiro", modelId: "claude-opus-4.8", displayName: "Claude Opus 4.8", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
-  { provider: "kiro", modelId: "claude-opus-4.7", displayName: "Claude Opus 4.7", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
-  { provider: "kiro", modelId: "claude-opus-4.6", displayName: "Claude Opus 4.6", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
-  { provider: "kiro", modelId: "claude-sonnet-4.6", displayName: "Claude Sonnet 4.6", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
+  { provider: "kiro", modelId: "claude-sonnet-4.5", displayName: "Claude Sonnet 4.5", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
   { provider: "kiro", modelId: "claude-haiku-4.5", displayName: "Claude Haiku 4.5", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
   { provider: "kiro", modelId: "deepseek-3.2", displayName: "DeepSeek V3.2", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
   { provider: "kiro", modelId: "minimax-m2.5", displayName: "MiniMax M2.5", monthlyTokens: 25000, creditTokens: 0, freeType: "recurring-monthly", poolKey: "kiro", tos: "avoid" },
diff --git a/open-sse/config/providers/registry/kiro/index.ts b/open-sse/config/providers/registry/kiro/index.ts
index 6c4d41cf6e..71262a4f09 100644
--- a/open-sse/config/providers/registry/kiro/index.ts
+++ b/open-sse/config/providers/registry/kiro/index.ts
@@ -15,32 +15,14 @@ export const kiroProvider: RegistryEntry = {
     tokenUrl: "https://prod.us-east-1.auth.desktop.kiro.dev/refreshToken",
     authUrl: "https://prod.us-east-1.auth.desktop.kiro.dev",
   },
+  // Model IDs must match Kiro's real upstream catalog exactly — an unknown id
+  // makes Kiro return `400 "Invalid model. Please select a different model"`.
+  // Fabricated ids (auto-kiro, claude-opus-4.x, claude-fable-5, claude-sonnet-4.6)
+  // were removed after live VPS validation: Kiro offers no Opus/Fable, its Sonnet
+  // is 4.5 (not 4.6), and there is no "auto" model id (it was sent verbatim and
+  // 400'd). claude-sonnet-5 is a real Kiro model but plan-gated per account —
+  // kept so entitled accounts can use it. See kiro cluster #6112/#6113/#6099.
   models: [
-    { id: "auto-kiro", name: "Auto (Kiro picks best model)" },
-    {
-      id: "claude-fable-5",
-      name: "Claude Fable 5",
-      contextLength: 1000000,
-      maxOutputTokens: 128000,
-    },
-    {
-      id: "claude-opus-4.8",
-      name: "Claude Opus 4.8",
-      contextLength: 1000000,
-      maxOutputTokens: 128000,
-    },
-    {
-      id: "claude-opus-4.7",
-      name: "Claude Opus 4.7",
-      contextLength: 1000000,
-      maxOutputTokens: 128000,
-    },
-    {
-      id: "claude-opus-4.6",
-      name: "Claude Opus 4.6",
-      contextLength: 1000000,
-      maxOutputTokens: 128000,
-    },
     {
       id: "claude-sonnet-5",
       name: "Claude Sonnet 5",
@@ -48,8 +30,8 @@ export const kiroProvider: RegistryEntry = {
       maxOutputTokens: 128000,
     },
     {
-      id: "claude-sonnet-4.6",
-      name: "Claude Sonnet 4.6",
+      id: "claude-sonnet-4.5",
+      name: "Claude Sonnet 4.5",
       contextLength: 200000,
       maxOutputTokens: 64000,
     },
diff --git a/open-sse/translator/request/openai-to-kiro.ts b/open-sse/translator/request/openai-to-kiro.ts
index fc6d39abfd..02cbd4aa1e 100644
--- a/open-sse/translator/request/openai-to-kiro.ts
+++ b/open-sse/translator/request/openai-to-kiro.ts
@@ -57,9 +57,9 @@ function convertMessages(messages, tools, model) {
   let toolsAttached = false;
 
   // Only Claude models support images in Kiro. Kiro also routes non-Claude
-  // models (deepseek, minimax, glm, qwen3-coder-next, auto-kiro) that do not
-  // accept image attachments — gate image extraction behind a Claude check so
-  // we never attach images those models would reject.
+  // models (deepseek, minimax, glm, qwen3-coder-next) that do not accept image
+  // attachments — gate image extraction behind a Claude check so we never
+  // attach images those models would reject.
   const supportsImages = typeof model === "string" && model.toLowerCase().includes("claude");
 
   const flushPending = () => {
diff --git a/src/shared/constants/pricing/oauth-subscriptions.ts b/src/shared/constants/pricing/oauth-subscriptions.ts
index b5aa770351..04792b5ea1 100644
--- a/src/shared/constants/pricing/oauth-subscriptions.ts
+++ b/src/shared/constants/pricing/oauth-subscriptions.ts
@@ -584,7 +584,10 @@ export const DEFAULT_PRICING_OAUTH = {
       reasoning: 8.0,
       cache_creation: 2.0,
     },
-    // Kiro "Auto" model — routes to best available
+    // Kiro "Auto" pricing — retained as a fallback price for any legacy "auto"
+    // reference. The "auto-kiro" registry model was removed (Kiro's API has no
+    // "auto" model id — it 400'd "Invalid model"), so its dedicated price key
+    // was dropped with it. See kiro cluster #6112/#6113/#6099.
     auto: {
       input: 3.0,
       output: 15.0,
@@ -592,13 +595,5 @@ export const DEFAULT_PRICING_OAUTH = {
       reasoning: 15.0,
       cache_creation: 3.0,
     },
-    // Registry exposes the Auto model as id "auto-kiro" — keep both keys priced.
-    "auto-kiro": {
-      input: 3.0,
-      output: 15.0,
-      cached: 1.5,
-      reasoning: 15.0,
-      cache_creation: 3.0,
-    },
   },
 };
diff --git a/tests/unit/kiro-catalog-real-models.test.ts b/tests/unit/kiro-catalog-real-models.test.ts
new file mode 100644
index 0000000000..e896ca5e44
--- /dev/null
+++ b/tests/unit/kiro-catalog-real-models.test.ts
@@ -0,0 +1,58 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+import { REGISTRY } from "@omniroute/open-sse/config/providers/index.ts";
+import { FREE_MODEL_BUDGETS } from "@omniroute/open-sse/config/freeModelCatalog.data.ts";
+
+// Kiro's upstream (`generateAssistantResponse`) returns 400 "Invalid model.
+// Please select a different model" for any model id it does not recognize. The
+// registry must therefore expose ONLY ids Kiro actually serves. These ids were
+// fabricated (copied from OmniRoute's own Anthropic catalog) and live-verified
+// to 400 on the VPS — they must never reappear. Regression guard for the kiro
+// cluster (#6112/#6113/#6099).
+const FABRICATED_KIRO_IDS = [
+  "auto-kiro", // no "auto" model id on Kiro — was sent verbatim and 400'd
+  "claude-fable-5", // Kiro offers no Fable
+  "claude-opus-4.8", // Kiro offers no Opus
+  "claude-opus-4.7",
+  "claude-opus-4.6",
+  "claude-sonnet-4.6", // Kiro's Sonnet is 4.5, not 4.6
+];
+
+// Ids proven to return 200 on the VPS (or a real, plan-gated Kiro model).
+const REAL_KIRO_IDS = [
+  "claude-sonnet-5", // real model, plan-gated per account (kept)
+  "claude-sonnet-4.5", // proven 200 (replaces the fabricated 4.6)
+  "claude-haiku-4.5", // proven 200
+  "deepseek-3.2", // proven 200
+  "glm-5", // proven 200
+  "minimax-m2.5", // proven 200
+  "minimax-m2.1", // proven 200
+  "qwen3-coder-next", // proven 200
+];
+
+test("kiro registry exposes no fabricated model ids", () => {
+  const ids = new Set((REGISTRY.kiro?.models || []).map((m) => m.id));
+  for (const bad of FABRICATED_KIRO_IDS) {
+    assert.ok(!ids.has(bad), `kiro registry must not expose fabricated id "${bad}"`);
+  }
+});
+
+test("kiro registry exposes exactly the real Kiro model ids", () => {
+  const ids = (REGISTRY.kiro?.models || []).map((m) => m.id).sort();
+  assert.deepEqual(ids, [...REAL_KIRO_IDS].sort());
+});
+
+test("kiro free-model catalog carries no fabricated ids", () => {
+  const kiroCatalogIds = new Set(
+    FREE_MODEL_BUDGETS.filter((e) => e.provider === "kiro").map((e) => e.modelId)
+  );
+  for (const bad of FABRICATED_KIRO_IDS) {
+    assert.ok(!kiroCatalogIds.has(bad), `free catalog must not list fabricated kiro id "${bad}"`);
+  }
+  // Every kiro free-catalog entry must exist in the registry (no orphans).
+  const registryIds = new Set((REGISTRY.kiro?.models || []).map((m) => m.id));
+  for (const id of kiroCatalogIds) {
+    assert.ok(registryIds.has(id), `free catalog kiro id "${id}" is not in the registry`);
+  }
+});