Update app.py

app.py

@@ -23,7 +23,7 @@ async def run_and_submit_all(profile: gr.OAuthProfile | None):
         agent = ToolCallingAgent(
             tools=[search_tool],
                         model=OpenAIServerModel(
-                    model_id="gpt-o4-mini",            # ✅ valid OpenAI model name
+                    model_id="gpt-4.1",            # ✅ valid OpenAI model name
                     api_key=os.environ["OPENAI_API_KEY"] # ✅ securely load from environment
                 ),
             max_steps=20,