diff --git a/src/app/api/admin/ai-settings/route.ts b/src/app/api/admin/ai-settings/route.ts
index 0883f5e5d..90f406b88 100644
--- a/src/app/api/admin/ai-settings/route.ts
+++ b/src/app/api/admin/ai-settings/route.ts
@@ -18,7 +18,7 @@ export const GET = apiHandler(async () => {
   });
 
   const hasKey = Boolean(settings?.adminAiKeyEncrypted);
-  const model = settings?.adminAiModel ?? "gpt-4o-mini";
+  const model = settings?.adminAiModel ?? "gpt-4o";
   const baseUrl = settings?.adminAiBaseUrl ?? "https://api.openai.com/v1";
 
   return apiSuccess({
diff --git a/src/lib/ai/provider.ts b/src/lib/ai/provider.ts
index e695f3058..e71b923c4 100644
--- a/src/lib/ai/provider.ts
+++ b/src/lib/ai/provider.ts
@@ -52,7 +52,7 @@ function buildUserProvider(row: UserAIRow): AIProvider | null {
       // the SDK default is correct.
       return new AnthropicClient({
         apiKey: decrypt(row.aiAnthropicKeyEncrypted),
-        model: row.aiModel ?? "claude-3-5-sonnet-latest",
+        model: row.aiModel ?? "claude-sonnet-4-6",
       });
     }
     case "LOCAL": {