diff --git a/packages/core/src/config/config.test.ts b/packages/core/src/config/config.test.ts
index 8efeed4196..b3c917944b 100644
--- a/packages/core/src/config/config.test.ts
+++ b/packages/core/src/config/config.test.ts
@@ -581,7 +581,7 @@ describe('Server Config (config.ts)', () => {
         useModelRouter: true,
       });
       await config.refreshAuth(AuthType.LOGIN_WITH_GOOGLE);
-      expect(config.getUseModelRouter()).toBe(false);
+      expect(config.getUseModelRouter()).toBe(true);
     });
 
     it('should enable model router by default for other auth types', async () => {
diff --git a/packages/core/src/config/config.ts b/packages/core/src/config/config.ts
index bd15b84f7d..8e267965f2 100644
--- a/packages/core/src/config/config.ts
+++ b/packages/core/src/config/config.ts
@@ -476,9 +476,7 @@ export class Config {
     this.useWriteTodos = params.useWriteTodos ?? false;
     this.initialUseModelRouter = params.useModelRouter ?? false;
     this.useModelRouter = this.initialUseModelRouter;
-    this.disableModelRouterForAuth = params.disableModelRouterForAuth ?? [
-      AuthType.LOGIN_WITH_GOOGLE,
-    ];
+    this.disableModelRouterForAuth = params.disableModelRouterForAuth ?? [];
     this.enableMessageBusIntegration =
       params.enableMessageBusIntegration ?? false;
     this.codebaseInvestigatorSettings = {