Update app.py

app.py

@@ -128,7 +128,7 @@ If the user is engaging in discussion, try to steer them towards getting in touc
         messages = [{"role": "system", "content": self.system_prompt()}] + history + [{"role": "user", "content": message}]
         done = False
         while not done:
-            response = self.gemini.chat.completions.create(model="imagen-4-generate", messages=messages, tools=tools)
+            response = self.groq.chat.completions.create(model="openai/gpt-oss-20b", messages=messages, tools=tools)
             if response.choices[0].finish_reason=="tool_calls":
                 message = response.choices[0].message
                 tool_calls = message.tool_calls