Update app.py

app.py

@@ -27,7 +27,7 @@ assistant_id = "asst_bj2N3tOyOXHjuZSTsXuZrXuF"  # Replace with your own assistan
 
 def ensure_single_thread_id():
     if "thread_id" not in st.session_state:
-        thread = client.threads.create()
+        thread = client.beta.threads.create()
         st.session_state.thread_id = thread.id
     return st.session_state.thread_id