diff --git a/packages/adapters/codex-local/src/index.test.ts b/packages/adapters/codex-local/src/index.test.ts
index 855a0c06db..5671557c5a 100644
--- a/packages/adapters/codex-local/src/index.test.ts
+++ b/packages/adapters/codex-local/src/index.test.ts
@@ -14,13 +14,20 @@ describe("codex local adapter metadata", () => {
     // Default to the concrete gpt-5.6-sol slug — Codex ships no metadata for the bare gpt-5.6
     // alias, so it must not be advertised or used as the default (it triggers a fallback warning).
     expect(DEFAULT_CODEX_LOCAL_MODEL).toBe("gpt-5.6-sol");
-    expect(modelIds.slice(0, 6)).toEqual([
-      "gpt-5.6-sol",
+    // Ordered like the ChatGPT app: newest version first, then by capability within a version (#14878).
+    expect(modelIds.slice(0, 12)).toEqual([
       "gpt-6-astra",
       "gpt-6-sol",
       "gpt-6-luna",
+      "gpt-5.6-sol",
       "gpt-5.6-terra",
       "gpt-5.6-luna",
+      "gpt-5.5",
+      "gpt-5.4",
+      "gpt-5.4-mini",
+      "gpt-5",
+      "gpt-5-mini",
+      "gpt-5-nano",
     ]);
     expect(modelIds).not.toContain("gpt-5.6");
     expect(isCodexLocalFastModeSupported(DEFAULT_CODEX_LOCAL_MODEL)).toBe(true);
diff --git a/packages/adapters/codex-local/src/index.ts b/packages/adapters/codex-local/src/index.ts
index 5d3a95c888..61512939a9 100644
--- a/packages/adapters/codex-local/src/index.ts
+++ b/packages/adapters/codex-local/src/index.ts
@@ -106,22 +106,25 @@ export function isCodexLocalFastModeSupported(model: string | null | undefined):
   );
 }
 
+// Ordered the way the ChatGPT app orders Codex models (#14878): newest model version first,
+// then by decreasing capability inside each version, older models at the end. The server
+// returns this list as written and the model dropdown keeps its order.
 export const models = [
-  // DEFAULT_CODEX_LOCAL_MODEL is gpt-5.6-sol, so it doubles as the first (default) 5.6 entry.
-  { id: DEFAULT_CODEX_LOCAL_MODEL, label: DEFAULT_CODEX_LOCAL_MODEL },
   { id: "gpt-6-astra", label: "gpt-6-astra" },
   { id: "gpt-6-sol", label: "gpt-6-sol" },
   { id: "gpt-6-luna", label: "gpt-6-luna" },
+  // DEFAULT_CODEX_LOCAL_MODEL is gpt-5.6-sol, the first 5.6 entry.
+  { id: DEFAULT_CODEX_LOCAL_MODEL, label: DEFAULT_CODEX_LOCAL_MODEL },
   { id: "gpt-5.6-terra", label: "gpt-5.6-terra" },
   { id: "gpt-5.6-luna", label: "gpt-5.6-luna" },
   { id: "gpt-5.5", label: "gpt-5.5" },
   { id: "gpt-5.4", label: "gpt-5.4" },
   { id: "gpt-5.4-mini", label: "gpt-5.4-mini" },
   { id: "gpt-5", label: "gpt-5" },
-  { id: "o3", label: "o3" },
-  { id: "o4-mini", label: "o4-mini" },
   { id: "gpt-5-mini", label: "gpt-5-mini" },
   { id: "gpt-5-nano", label: "gpt-5-nano" },
+  { id: "o3", label: "o3" },
+  { id: "o4-mini", label: "o4-mini" },
   { id: "o3-mini", label: "o3-mini" },
   { id: "codex-mini-latest", label: "Codex Mini" },
 ];