diff --git a/extensions/codex/src/app-server/auth-bridge.test.ts b/extensions/codex/src/app-server/auth-bridge.test.ts
index 96ee010aee9..5a6175a6b92 100644
--- a/extensions/codex/src/app-server/auth-bridge.test.ts
+++ b/extensions/codex/src/app-server/auth-bridge.test.ts
@@ -387,6 +387,40 @@ describe("bridgeCodexAppServerStartOptions", () => {
     }
   });
 
+  it("applies the default OpenAI Codex OAuth profile when no profile id is explicit", async () => {
+    const agentDir = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-codex-app-server-"));
+    const request = vi.fn(async () => ({ type: "chatgptAuthTokens" }));
+    try {
+      upsertAuthProfile({
+        agentDir,
+        profileId: "openai-codex:default",
+        credential: {
+          type: "oauth",
+          provider: "openai-codex",
+          access: "default-access-token",
+          refresh: "default-refresh-token",
+          expires: Date.now() + 24 * 60 * 60_000,
+          accountId: "account-default",
+          email: "codex-default@example.test",
+        },
+      });
+
+      await applyCodexAppServerAuthProfile({
+        client: { request } as never,
+        agentDir,
+      });
+
+      expect(request).toHaveBeenCalledWith("account/login/start", {
+        type: "chatgptAuthTokens",
+        accessToken: "default-access-token",
+        chatgptAccountId: "account-default",
+        chatgptPlanType: null,
+      });
+    } finally {
+      await fs.rm(agentDir, { recursive: true, force: true });
+    }
+  });
+
   it("refreshes an expired OpenAI Codex OAuth profile before app-server login", async () => {
     const agentDir = await fs.mkdtemp(path.join(os.tmpdir(), "openclaw-codex-app-server-"));
     const request = vi.fn(async () => ({ type: "chatgptAuthTokens" }));
diff --git a/extensions/codex/src/app-server/auth-bridge.ts b/extensions/codex/src/app-server/auth-bridge.ts
index af98889b916..41363a256f9 100644
--- a/extensions/codex/src/app-server/auth-bridge.ts
+++ b/extensions/codex/src/app-server/auth-bridge.ts
@@ -3,8 +3,10 @@ import path from "node:path";
 import {
   ensureAuthProfileStore,
   loadAuthProfileStoreForSecretsRuntime,
+  resolveAuthProfileOrder,
   resolveProviderIdForAuth,
   resolveApiKeyForProfile,
+  resolveOpenClawAgentDir,
   resolvePersistedAuthProfileOwnerAgentDir,
   saveAuthProfileStore,
   type AuthProfileCredential,
@@ -28,6 +30,8 @@ const OPENAI_API_KEY_ENV_VAR = "OPENAI_API_KEY";
 const CODEX_APP_SERVER_API_KEY_ENV_VARS = [CODEX_API_KEY_ENV_VAR, OPENAI_API_KEY_ENV_VAR];
 const CODEX_APP_SERVER_ISOLATION_ENV_VARS = [CODEX_HOME_ENV_VAR, HOME_ENV_VAR];
 
+type AuthProfileOrderConfig = Parameters<typeof resolveAuthProfileOrder>[0]["cfg"];
+
 export async function bridgeCodexAppServerStartOptions(params: {
   startOptions: CodexAppServerStartOptions;
   agentDir: string;
@@ -41,15 +45,49 @@ export async function bridgeCodexAppServerStartOptions(params: {
     params.agentDir,
   );
   const store = ensureAuthProfileStore(params.agentDir, { allowKeychainPrompt: false });
+  const authProfileId = resolveCodexAppServerAuthProfileId({
+    authProfileId: params.authProfileId,
+    store,
+  });
   const shouldClearInheritedOpenAiApiKey = shouldClearOpenAiApiKeyForCodexAuthProfile({
     store,
-    authProfileId: params.authProfileId,
+    authProfileId,
   });
   return shouldClearInheritedOpenAiApiKey
     ? withClearedEnvironmentVariables(isolatedStartOptions, CODEX_APP_SERVER_API_KEY_ENV_VARS)
     : isolatedStartOptions;
 }
 
+export function resolveCodexAppServerAuthProfileId(params: {
+  authProfileId?: string;
+  store: ReturnType<typeof ensureAuthProfileStore>;
+  config?: AuthProfileOrderConfig;
+}): string | undefined {
+  const requested = params.authProfileId?.trim();
+  if (requested) {
+    return requested;
+  }
+  return resolveAuthProfileOrder({
+    cfg: params.config,
+    store: params.store,
+    provider: CODEX_APP_SERVER_AUTH_PROVIDER,
+  })[0]?.trim();
+}
+
+export function resolveCodexAppServerAuthProfileIdForAgent(params: {
+  authProfileId?: string;
+  agentDir?: string;
+  config?: AuthProfileOrderConfig;
+}): string | undefined {
+  const agentDir = params.agentDir?.trim() || resolveOpenClawAgentDir();
+  const store = ensureAuthProfileStore(agentDir, { allowKeychainPrompt: false });
+  return resolveCodexAppServerAuthProfileId({
+    authProfileId: params.authProfileId,
+    store,
+    config: params.config,
+  });
+}
+
 export function resolveCodexAppServerHomeDir(agentDir: string): string {
   return path.join(path.resolve(agentDir), CODEX_APP_SERVER_HOME_DIRNAME);
 }
@@ -153,11 +191,14 @@ async function resolveCodexAppServerAuthProfileLoginParamsInternal(params: {
   authProfileId?: string;
   forceOAuthRefresh?: boolean;
 }): Promise<LoginAccountParams | undefined> {
-  const profileId = params.authProfileId?.trim();
+  const store = ensureAuthProfileStore(params.agentDir, { allowKeychainPrompt: false });
+  const profileId = resolveCodexAppServerAuthProfileId({
+    authProfileId: params.authProfileId,
+    store,
+  });
   if (!profileId) {
     return undefined;
   }
-  const store = ensureAuthProfileStore(params.agentDir, { allowKeychainPrompt: false });
   const credential = store.profiles[profileId];
   if (!credential) {
     throw new Error(`Codex app-server auth profile "${profileId}" was not found.`);
diff --git a/extensions/codex/src/app-server/run-attempt.ts b/extensions/codex/src/app-server/run-attempt.ts
index 6e737f437fc..50783c861a8 100644
--- a/extensions/codex/src/app-server/run-attempt.ts
+++ b/extensions/codex/src/app-server/run-attempt.ts
@@ -40,7 +40,11 @@ import {
 } from "openclaw/plugin-sdk/agent-harness-runtime";
 import { emitTrustedDiagnosticEvent } from "openclaw/plugin-sdk/diagnostic-runtime";
 import { handleCodexAppServerApprovalRequest } from "./approval-bridge.js";
-import { refreshCodexAppServerAuthTokens } from "./auth-bridge.js";
+import {
+  refreshCodexAppServerAuthTokens,
+  resolveCodexAppServerAuthProfileId,
+  resolveCodexAppServerAuthProfileIdForAgent,
+} from "./auth-bridge.js";
 import {
   createCodexAppServerClientFactoryTestHooks,
   defaultCodexAppServerClientFactory,
@@ -377,16 +381,31 @@ export async function runCodexAppServerAttempt(
     agentId: params.agentId,
   });
   const agentDir = params.agentDir ?? resolveOpenClawAgentDir();
-  const runtimeParams = { ...params, sessionKey: sandboxSessionKey };
+  const startupBinding = await readCodexAppServerBinding(params.sessionFile);
+  const startupAuthProfileCandidate =
+    params.runtimePlan?.auth.forwardedAuthProfileId ??
+    params.authProfileId ??
+    startupBinding?.authProfileId;
+  const startupAuthProfileId = params.authProfileStore
+    ? resolveCodexAppServerAuthProfileId({
+        authProfileId: startupAuthProfileCandidate,
+        store: params.authProfileStore,
+        config: params.config,
+      })
+    : resolveCodexAppServerAuthProfileIdForAgent({
+        authProfileId: startupAuthProfileCandidate,
+        agentDir,
+        config: params.config,
+      });
+  const runtimeParams = {
+    ...params,
+    sessionKey: sandboxSessionKey,
+    ...(startupAuthProfileId ? { authProfileId: startupAuthProfileId } : {}),
+  };
   const activeContextEngine = isActiveHarnessContextEngine(params.contextEngine)
     ? params.contextEngine
     : undefined;
   let yieldDetected = false;
-  const startupBinding = await readCodexAppServerBinding(params.sessionFile);
-  const startupAuthProfileId =
-    params.runtimePlan?.auth.forwardedAuthProfileId ??
-    params.authProfileId ??
-    startupBinding?.authProfileId;
   const tools = await buildDynamicTools({
     params,
     resolvedWorkspace,
@@ -553,7 +572,7 @@ export async function runCodexAppServerAttempt(
           });
           const startupThread = await startOrResumeThread({
             client: startupClient,
-            params,
+            params: runtimeParams,
             cwd: effectiveWorkspace,
             dynamicTools: toolBridge.specs,
             appServer,
diff --git a/extensions/codex/src/app-server/thread-lifecycle.test.ts b/extensions/codex/src/app-server/thread-lifecycle.test.ts
index 9507c6fb1a5..f8524cf8601 100644
--- a/extensions/codex/src/app-server/thread-lifecycle.test.ts
+++ b/extensions/codex/src/app-server/thread-lifecycle.test.ts
@@ -1,5 +1,70 @@
+import type { EmbeddedRunAttemptParams } from "openclaw/plugin-sdk/agent-harness-runtime";
 import { describe, expect, it } from "vitest";
-import { resolveReasoningEffort } from "./thread-lifecycle.js";
+import {
+  buildThreadResumeParams,
+  buildThreadStartParams,
+  resolveReasoningEffort,
+} from "./thread-lifecycle.js";
+
+function createAttemptParams(params: {
+  provider: string;
+  authProfileId?: string;
+}): EmbeddedRunAttemptParams {
+  return {
+    provider: params.provider,
+    modelId: "gpt-5.4",
+    authProfileId: params.authProfileId,
+  } as EmbeddedRunAttemptParams;
+}
+
+function createAppServerOptions() {
+  return {
+    approvalPolicy: "on-request",
+    approvalsReviewer: "user",
+    sandbox: "workspace-write",
+  } as const;
+}
+
+describe("Codex app-server model provider selection", () => {
+  it.each(["openai", "openai-codex"])(
+    "omits public %s modelProvider when forwarding native Codex auth on thread/start",
+    (provider) => {
+      const request = buildThreadStartParams(
+        createAttemptParams({ provider, authProfileId: "openai-codex:work" }),
+        {
+          cwd: "/repo",
+          dynamicTools: [],
+          appServer: createAppServerOptions() as never,
+          developerInstructions: "test instructions",
+        },
+      );
+
+      expect(request).not.toHaveProperty("modelProvider");
+    },
+  );
+
+  it("uses the bound native Codex auth profile when deciding thread/resume modelProvider", () => {
+    const request = buildThreadResumeParams(createAttemptParams({ provider: "openai" }), {
+      threadId: "thread-1",
+      authProfileId: "openai-codex:bound",
+      appServer: createAppServerOptions() as never,
+      developerInstructions: "test instructions",
+    });
+
+    expect(request).not.toHaveProperty("modelProvider");
+  });
+
+  it("keeps public OpenAI modelProvider when no native Codex auth profile is selected", () => {
+    const request = buildThreadStartParams(createAttemptParams({ provider: "openai" }), {
+      cwd: "/repo",
+      dynamicTools: [],
+      appServer: createAppServerOptions() as never,
+      developerInstructions: "test instructions",
+    });
+
+    expect(request).toMatchObject({ modelProvider: "openai" });
+  });
+});
 
 describe("resolveReasoningEffort (#71946)", () => {
   describe("modern Codex models (none/low/medium/high/xhigh enum)", () => {
diff --git a/extensions/codex/src/app-server/thread-lifecycle.ts b/extensions/codex/src/app-server/thread-lifecycle.ts
index bb3741f0588..61f151d9415 100644
--- a/extensions/codex/src/app-server/thread-lifecycle.ts
+++ b/extensions/codex/src/app-server/thread-lifecycle.ts
@@ -25,6 +25,7 @@ import {
 } from "./protocol.js";
 import {
   clearCodexAppServerBinding,
+  isCodexAppServerNativeAuthProfileId,
   readCodexAppServerBinding,
   writeCodexAppServerBinding,
   type CodexAppServerThreadBinding,
@@ -57,19 +58,24 @@ export async function startOrResumeThread(params: {
       await clearCodexAppServerBinding(params.params.sessionFile);
     } else {
       try {
+        const authProfileId = params.params.authProfileId ?? binding.authProfileId;
         const response = assertCodexThreadResumeResponse(
           await params.client.request(
             "thread/resume",
             buildThreadResumeParams(params.params, {
               threadId: binding.threadId,
+              authProfileId,
               appServer: params.appServer,
               developerInstructions: params.developerInstructions,
               config: params.config,
             }),
           ),
         );
-        const boundAuthProfileId = params.params.authProfileId ?? binding.authProfileId;
-        const fallbackModelProvider = resolveCodexAppServerModelProvider(params.params.provider);
+        const boundAuthProfileId = authProfileId;
+        const fallbackModelProvider = resolveCodexAppServerModelProvider({
+          provider: params.params.provider,
+          authProfileId: boundAuthProfileId,
+        });
         await writeCodexAppServerBinding(params.params.sessionFile, {
           threadId: response.thread.id,
           cwd: params.cwd,
@@ -112,7 +118,10 @@ export async function startOrResumeThread(params: {
       }),
     ),
   );
-  const modelProvider = resolveCodexAppServerModelProvider(params.params.provider);
+  const modelProvider = resolveCodexAppServerModelProvider({
+    provider: params.params.provider,
+    authProfileId: params.params.authProfileId,
+  });
   const createdAt = new Date().toISOString();
   await writeCodexAppServerBinding(params.params.sessionFile, {
     threadId: response.thread.id,
@@ -147,7 +156,10 @@ export function buildThreadStartParams(
     config?: JsonObject;
   },
 ): CodexThreadStartParams {
-  const modelProvider = resolveCodexAppServerModelProvider(params.provider);
+  const modelProvider = resolveCodexAppServerModelProvider({
+    provider: params.provider,
+    authProfileId: params.authProfileId,
+  });
   return {
     model: params.modelId,
     ...(modelProvider ? { modelProvider } : {}),
@@ -169,12 +181,16 @@ export function buildThreadResumeParams(
   params: EmbeddedRunAttemptParams,
   options: {
     threadId: string;
+    authProfileId?: string;
     appServer: CodexAppServerRuntimeOptions;
     developerInstructions?: string;
     config?: JsonObject;
   },
 ): CodexThreadResumeParams {
-  const modelProvider = resolveCodexAppServerModelProvider(params.provider);
+  const modelProvider = resolveCodexAppServerModelProvider({
+    provider: params.provider,
+    authProfileId: options.authProfileId ?? params.authProfileId,
+  });
   return {
     threadId: options.threadId,
     model: params.modelId,
@@ -326,14 +342,28 @@ function buildUserInput(
   ];
 }
 
-function resolveCodexAppServerModelProvider(provider: string): string | undefined {
-  const normalized = provider.trim();
-  if (!normalized || normalized === "codex") {
+function resolveCodexAppServerModelProvider(params: {
+  provider: string;
+  authProfileId?: string;
+}): string | undefined {
+  const normalized = params.provider.trim();
+  const normalizedLower = normalized.toLowerCase();
+  if (!normalized || normalizedLower === "codex") {
     // `codex` is OpenClaw's virtual provider; let Codex app-server keep its
     // native provider/auth selection instead of forcing the legacy OpenAI path.
     return undefined;
   }
-  return normalized === "openai-codex" ? "openai" : normalized;
+  if (
+    isCodexAppServerNativeAuthProfileId(params.authProfileId) &&
+    (normalizedLower === "openai" || normalizedLower === "openai-codex")
+  ) {
+    // When OpenClaw is forwarding ChatGPT/Codex OAuth, forcing the public
+    // OpenAI model provider makes app-server call api.openai.com without the
+    // ChatGPT bearer and fails with "Missing bearer or basic authentication".
+    // Omit the provider so app-server keeps its native account-backed route.
+    return undefined;
+  }
+  return normalizedLower === "openai-codex" ? "openai" : normalized;
 }
 
 // Modern Codex models (gpt-5.5, gpt-5.4, gpt-5.4-mini, gpt-5.2) use the
diff --git a/extensions/codex/src/command-handlers.ts b/extensions/codex/src/command-handlers.ts
index 576c1fb74d7..c33ae755176 100644
--- a/extensions/codex/src/command-handlers.ts
+++ b/extensions/codex/src/command-handlers.ts
@@ -339,6 +339,7 @@ async function bindConversation(
   const authProfileId = existingBinding?.authProfileId;
   const startParams: Parameters<CodexCommandDeps["startCodexConversationThread"]>[0] = {
     pluginConfig,
+    config: ctx.config,
     sessionFile: ctx.sessionFile,
     workspaceDir,
     threadId: parsed.threadId,
diff --git a/extensions/codex/src/commands.test.ts b/extensions/codex/src/commands.test.ts
index b3a9350b21e..9b453a5052e 100644
--- a/extensions/codex/src/commands.test.ts
+++ b/extensions/codex/src/commands.test.ts
@@ -1422,6 +1422,7 @@ describe("codex command", () => {
     });
     expect(startCodexConversationThread).toHaveBeenCalledWith({
       pluginConfig: undefined,
+      config: {},
       sessionFile,
       workspaceDir: "/repo",
       threadId: "thread-123",
diff --git a/extensions/codex/src/conversation-binding.test.ts b/extensions/codex/src/conversation-binding.test.ts
index 5ef42eeb0cb..9ecaeb7d09e 100644
--- a/extensions/codex/src/conversation-binding.test.ts
+++ b/extensions/codex/src/conversation-binding.test.ts
@@ -7,7 +7,19 @@ const sharedClientMocks = vi.hoisted(() => ({
   getSharedCodexAppServerClient: vi.fn(),
 }));
 
+const agentRuntimeMocks = vi.hoisted(() => ({
+  ensureAuthProfileStore: vi.fn(),
+  loadAuthProfileStoreForSecretsRuntime: vi.fn(),
+  resolveApiKeyForProfile: vi.fn(),
+  resolveAuthProfileOrder: vi.fn(),
+  resolveOpenClawAgentDir: vi.fn(() => "/agent"),
+  resolvePersistedAuthProfileOwnerAgentDir: vi.fn(),
+  resolveProviderIdForAuth: vi.fn((provider: string) => provider),
+  saveAuthProfileStore: vi.fn(),
+}));
+
 vi.mock("./app-server/shared-client.js", () => sharedClientMocks);
+vi.mock("openclaw/plugin-sdk/agent-runtime", () => agentRuntimeMocks);
 
 import {
   handleCodexConversationBindingResolved,
@@ -24,9 +36,74 @@ describe("codex conversation binding", () => {
 
   afterEach(async () => {
     sharedClientMocks.getSharedCodexAppServerClient.mockReset();
+    agentRuntimeMocks.ensureAuthProfileStore.mockReset();
+    agentRuntimeMocks.loadAuthProfileStoreForSecretsRuntime.mockReset();
+    agentRuntimeMocks.resolveApiKeyForProfile.mockReset();
+    agentRuntimeMocks.resolveAuthProfileOrder.mockReset();
+    agentRuntimeMocks.resolveOpenClawAgentDir.mockClear();
+    agentRuntimeMocks.resolvePersistedAuthProfileOwnerAgentDir.mockReset();
+    agentRuntimeMocks.resolveProviderIdForAuth.mockClear();
+    agentRuntimeMocks.saveAuthProfileStore.mockReset();
     await fs.rm(tempDir, { recursive: true, force: true });
   });
 
+  beforeEach(() => {
+    agentRuntimeMocks.ensureAuthProfileStore.mockReturnValue({ version: 1, profiles: {} });
+    agentRuntimeMocks.resolveAuthProfileOrder.mockReturnValue([]);
+    agentRuntimeMocks.resolveOpenClawAgentDir.mockReturnValue("/agent");
+    agentRuntimeMocks.resolveProviderIdForAuth.mockImplementation((provider: string) => provider);
+  });
+
+  it("uses the default Codex auth profile and omits the public OpenAI provider for new binds", async () => {
+    const sessionFile = path.join(tempDir, "session.jsonl");
+    const config = { auth: { order: { "openai-codex": ["openai-codex:default"] } } };
+    const requests: Array<{ method: string; params: Record<string, unknown> }> = [];
+    agentRuntimeMocks.ensureAuthProfileStore.mockReturnValue({
+      version: 1,
+      profiles: {
+        "openai-codex:default": {
+          type: "oauth",
+          provider: "openai-codex",
+          access: "access-token",
+        },
+      },
+    });
+    agentRuntimeMocks.resolveAuthProfileOrder.mockReturnValue(["openai-codex:default"]);
+    sharedClientMocks.getSharedCodexAppServerClient.mockResolvedValue({
+      request: vi.fn(async (method: string, requestParams: Record<string, unknown>) => {
+        requests.push({ method, params: requestParams });
+        return {
+          thread: { id: "thread-new", cwd: tempDir },
+          model: "gpt-5.4-mini",
+        };
+      }),
+    });
+
+    await startCodexConversationThread({
+      config: config as never,
+      sessionFile,
+      workspaceDir: tempDir,
+      model: "gpt-5.4-mini",
+      modelProvider: "openai",
+    });
+
+    expect(agentRuntimeMocks.resolveAuthProfileOrder).toHaveBeenCalledWith(
+      expect.objectContaining({ cfg: config, provider: "openai-codex" }),
+    );
+    expect(sharedClientMocks.getSharedCodexAppServerClient).toHaveBeenCalledWith(
+      expect.objectContaining({ authProfileId: "openai-codex:default" }),
+    );
+    expect(requests).toHaveLength(1);
+    expect(requests[0]).toMatchObject({
+      method: "thread/start",
+      params: expect.objectContaining({ model: "gpt-5.4-mini" }),
+    });
+    expect(requests[0]?.params).not.toHaveProperty("modelProvider");
+    await expect(fs.readFile(`${sessionFile}.codex-app-server.json`, "utf8")).resolves.toContain(
+      '"authProfileId": "openai-codex:default"',
+    );
+  });
+
   it("preserves Codex auth and omits the public OpenAI provider for native bind threads", async () => {
     const sessionFile = path.join(tempDir, "session.jsonl");
     await fs.writeFile(
diff --git a/extensions/codex/src/conversation-binding.ts b/extensions/codex/src/conversation-binding.ts
index 613f595817e..1a2a92eb848 100644
--- a/extensions/codex/src/conversation-binding.ts
+++ b/extensions/codex/src/conversation-binding.ts
@@ -5,6 +5,7 @@ import type {
   PluginHookInboundClaimEvent,
 } from "openclaw/plugin-sdk/plugin-entry";
 import type { ReplyPayload } from "openclaw/plugin-sdk/reply-payload";
+import { resolveCodexAppServerAuthProfileIdForAgent } from "./app-server/auth-bridge.js";
 import { CODEX_CONTROL_METHODS } from "./app-server/capabilities.js";
 import {
   codexSandboxPolicyForTurn,
@@ -49,6 +50,7 @@ type CodexConversationRunOptions = {
 
 type CodexConversationStartParams = {
   pluginConfig?: unknown;
+  config?: Parameters<typeof resolveCodexAppServerAuthProfileIdForAgent>[0]["config"];
   sessionFile: string;
   workspaceDir?: string;
   threadId?: string;
@@ -81,7 +83,10 @@ export async function startCodexConversationThread(
   const workspaceDir =
     params.workspaceDir?.trim() || resolveCodexDefaultWorkspaceDir(params.pluginConfig);
   const existingBinding = await readCodexAppServerBinding(params.sessionFile);
-  const authProfileId = params.authProfileId ?? existingBinding?.authProfileId;
+  const authProfileId = resolveCodexAppServerAuthProfileIdForAgent({
+    authProfileId: params.authProfileId ?? existingBinding?.authProfileId,
+    config: params.config,
+  });
   if (params.threadId?.trim()) {
     await attachExistingThread({
       pluginConfig: params.pluginConfig,