Update app.py

app.py

@@ -1060,7 +1060,7 @@ REMEMBER: One tool per turn. No reasoning without tools. Exact answer format.
             self.llm_with_tools = ChatGroq(
                 temperature=0,
                 groq_api_key=GROQ_API_KEY,
-                model_name="llama-3.3-70b-versatile",
+                model_name="openai/gpt-oss-20b",
                 max_tokens=4096,
                 timeout=60
                 ).bind_tools(self.tools, tool_choice="auto")