Update app.py

app.py

@@ -91,7 +91,7 @@ def main():
         with st.chat_message("assistant"):
             # message_placeholder = st.empty()
             stream_handler = StreamHandler(st.empty())
-            init_gpt(gpt_model, stream_handler)
+            init_gpt("gpt-3.5-turbo-16k", stream_handler)
             content = generate_content(
                 st.session_state.messages, knowledge_base
             )