Update app.py

app.py

@@ -31,7 +31,7 @@ if user_input:
     with st.chat_message("assistant"):
         with st.spinner("Thinking..."):
             response = client.chat.completions.create(
-                model="mixtral-8x7b-32768",
+                model="openai/gpt-oss-120b",
                 messages=st.session_state.messages,
                 max_tokens=500
             )