diff --git a/changelog/fragments/openai-codex-auth-tests-gpt54.md b/changelog/fragments/openai-codex-auth-tests-gpt54.md
new file mode 100644
index 00000000000..ec1cd4b199f
--- /dev/null
+++ b/changelog/fragments/openai-codex-auth-tests-gpt54.md
@@ -0,0 +1 @@
+- tests: align OpenAI Codex auth login expectations with the `gpt-5.4` default model to prevent stale CI failures. (#44367) thanks @jrrcdev
diff --git a/src/commands/models/auth.test.ts b/src/commands/models/auth.test.ts
index d5e383d775e..e59e7fd021e 100644
--- a/src/commands/models/auth.test.ts
+++ b/src/commands/models/auth.test.ts
@@ -183,7 +183,7 @@ describe("modelsAuthLoginCommand", () => {
       "Auth profile: openai-codex:user@example.com (openai-codex/oauth)",
     );
     expect(runtime.log).toHaveBeenCalledWith(
-      "Default model available: openai-codex/gpt-5.3-codex (use --set-default to apply)",
+      "Default model available: openai-codex/gpt-5.4 (use --set-default to apply)",
     );
   });
 
@@ -193,9 +193,9 @@ describe("modelsAuthLoginCommand", () => {
     await modelsAuthLoginCommand({ provider: "openai-codex", setDefault: true }, runtime);
 
     expect(lastUpdatedConfig?.agents?.defaults?.model).toEqual({
-      primary: "openai-codex/gpt-5.3-codex",
+      primary: "openai-codex/gpt-5.4",
     });
-    expect(runtime.log).toHaveBeenCalledWith("Default model set to openai-codex/gpt-5.3-codex");
+    expect(runtime.log).toHaveBeenCalledWith("Default model set to openai-codex/gpt-5.4");
   });
 
   it("keeps existing plugin error behavior for non built-in providers", async () => {