feat(openai): add gpt-5.4 support for API and Codex OAuth (#36590)

* feat(openai): add gpt-5.4 support and priority processing

* feat(openai-codex): add gpt-5.4 oauth support

* fix(openai): preserve provider overrides in gpt-5.4 fallback

* fix(openai-codex): keep xhigh for gpt-5.4 default

* fix(models): preserve configured overrides in list output

* fix(models): close gpt-5.4 integration gaps

* fix(openai): scope service tier to public api

* fix(openai): complete prep followups for gpt-5.4 support (#36590) (thanks @dorukardahan)

---------

Co-authored-by: Tyler Yust <TYTYYUST@YAHOO.COM>

src/agents/model-catalog.test.ts

@@ -114,6 +114,59 @@ describe("loadModelCatalog", () => {
     expect(spark?.reasoning).toBe(true);
   });
 
+  it("adds gpt-5.4 forward-compat catalog entries when template models exist", async () => {
+    mockPiDiscoveryModels([
+      {
+        id: "gpt-5.2",
+        provider: "openai",
+        name: "GPT-5.2",
+        reasoning: true,
+        contextWindow: 1_050_000,
+        input: ["text", "image"],
+      },
+      {
+        id: "gpt-5.2-pro",
+        provider: "openai",
+        name: "GPT-5.2 Pro",
+        reasoning: true,
+        contextWindow: 1_050_000,
+        input: ["text", "image"],
+      },
+      {
+        id: "gpt-5.3-codex",
+        provider: "openai-codex",
+        name: "GPT-5.3 Codex",
+        reasoning: true,
+        contextWindow: 272000,
+        input: ["text", "image"],
+      },
+    ]);
+
+    const result = await loadModelCatalog({ config: {} as OpenClawConfig });
+
+    expect(result).toContainEqual(
+      expect.objectContaining({
+        provider: "openai",
+        id: "gpt-5.4",
+        name: "gpt-5.4",
+      }),
+    );
+    expect(result).toContainEqual(
+      expect.objectContaining({
+        provider: "openai",
+        id: "gpt-5.4-pro",
+        name: "gpt-5.4-pro",
+      }),
+    );
+    expect(result).toContainEqual(
+      expect.objectContaining({
+        provider: "openai-codex",
+        id: "gpt-5.4",
+        name: "gpt-5.4",
+      }),
+    );
+  });
+
   it("merges configured models for opted-in non-pi-native providers", async () => {
     mockSingleOpenAiCatalogModel();