diff --git a/src/codex/catalog/sync.ts b/src/codex/catalog/sync.ts
index 3659a0a67..70ac8c270 100644
--- a/src/codex/catalog/sync.ts
+++ b/src/codex/catalog/sync.ts
@@ -214,6 +214,13 @@ export function deriveEntry(
     // Routed (namespaced) models inherit the gpt template — correct its OpenAI/GPT identity
     // and advertise the reasoning ladder Codex accepts.
     if (isRouted) {
+      // A routed model is NOT the native template: never inherit its context
+      // window when /models omits context metadata (#992). Known metadata
+      // restores exact values below; otherwise the strict-fields fallback
+      // supplies the conservative 128k triple.
+      delete e.context_window;
+      delete e.max_context_window;
+      delete e.auto_compact_token_limit;
       // Native id for identity text + metadata lookups — the slug may be an encoded
       // alias (`provider/vendor-model`); the model object carries the native id.
       const modelName = model?.id ?? slug.slice(slug.indexOf("/") + 1);
diff --git a/tests/codex-catalog.test.ts b/tests/codex-catalog.test.ts
index 2debabd4d..d04efdf24 100644
--- a/tests/codex-catalog.test.ts
+++ b/tests/codex-catalog.test.ts
@@ -1049,7 +1049,7 @@ describe("Codex catalog routed normalization", () => {
     expect(anthropic?.supports_parallel_tool_calls).toBe(false);
   });
 
-  test("routed entries fill auto compact when context already exists on the template", () => {
+  test("routed entries fall to the conservative triple instead of inheriting template context (#992)", () => {
     const template = {
       ...nativeTemplate(),
       context_window: 272_000,
@@ -1060,9 +1060,11 @@ describe("Codex catalog routed normalization", () => {
     ]);
     const routed = entries.find(e => e.slug === "local/qwen3-coder");
 
-    expect(routed?.context_window).toBe(272_000);
-    expect(routed?.max_context_window).toBe(272_000);
-    expect(routed?.auto_compact_token_limit).toBe(244_800);
+    // A routed model is not the native template: without known metadata the
+    // entry falls back to the conservative 128k triple.
+    expect(routed?.context_window).toBe(128_000);
+    expect(routed?.max_context_window).toBe(128_000);
+    expect(routed?.auto_compact_token_limit).toBe(115_200);
   });
 
   test("native gpt-5.4 uses its 1M context window override", () => {
@@ -1196,7 +1198,7 @@ describe("Codex catalog routed normalization", () => {
     expect(sol?.priority).toBe(1);
   });
 
-  test("routed entries still cap stale native max context to their active context window", () => {
+  test("routed entries drop stale native max context with the template window (#992)", () => {
     const template = {
       ...nativeTemplate(),
       context_window: 272_000,
@@ -1207,9 +1209,9 @@ describe("Codex catalog routed normalization", () => {
     ]);
     const routed = entries.find(e => e.slug === "local/qwen3-coder");
 
-    expect(routed?.context_window).toBe(272_000);
-    expect(routed?.max_context_window).toBe(272_000);
-    expect(routed?.auto_compact_token_limit).toBe(244_800);
+    expect(routed?.context_window).toBe(128_000);
+    expect(routed?.max_context_window).toBe(128_000);
+    expect(routed?.auto_compact_token_limit).toBe(115_200);
   });
 
   test("buildCatalogEntries preserves native bare GPT template fields", () => {
@@ -2301,6 +2303,35 @@ describe("Codex catalog routed normalization", () => {
     expect(routed?.default_reasoning_summary).toBe("none");
   });
 
+  test("a routed model never inherits the native template's context window (#992)", () => {
+    // /models returns only the id: the routed entry must fall to the
+    // conservative 128k triple, never the native template's larger window.
+    const entries = buildCatalogEntries({ context_window: 372_000 }, [], [
+      { provider: "relay", id: "relay-model" },
+    ]);
+    const routed = entries.find(e => e.slug === "relay/relay-model");
+    expect(routed?.context_window).toBe(128_000);
+    expect(routed?.max_context_window).toBe(128_000);
+    expect(routed?.auto_compact_token_limit).toBe(115_200);
+  });
+
+  test("a provider context cap never invents routed capacity (#992)", () => {
+    const entries = buildCatalogEntries({ context_window: 372_000 }, [], [
+      { provider: "relay", id: "relay-model", contextCap: 950_000 },
+    ]);
+    const routed = entries.find(e => e.slug === "relay/relay-model");
+    expect(routed?.context_window).toBe(128_000);
+  });
+
+  test("known routed metadata still restores the exact context window (#992)", () => {
+    const entries = buildCatalogEntries({ context_window: 372_000 }, [], [
+      { provider: "relay", id: "relay-model", contextWindow: 256_000 },
+    ]);
+    const routed = entries.find(e => e.slug === "relay/relay-model");
+    expect(routed?.context_window).toBe(256_000);
+    expect(routed?.auto_compact_token_limit).toBe(Math.floor(256_000 * 0.9));
+  });
+
   test("model-specific reasoning-summary opt-out reaches the routed catalog (#323)", async () => {
     const models = await gatherRoutedModels({
       providers: {