Update app.py

app.py

@@ -96,5 +96,5 @@ class SpyAgent(BasicAgent):
 if __name__ == '__main__':
     name = 'spy'
     code = "xxxx"
-    agent_builder = AgentBuilder(name, code, agent=SpyAgent(name), mock=True)
+    agent_builder = AgentBuilder(name, code, agent=SpyAgent(name, model_name='gpt-4o-mini'), mock=True)
     agent_builder.start()