Update app.py

app.py

@@ -1,7 +1,7 @@
 # --- Helper Functions ---
 
 # !!! WARNING: This function is adapted to the requested format and LOSES features !!!
-def get_openai_response_simplified(prompt, model=DEFAULT_MODEL, system_prompt="", chat_history=None):
+def get_openai_response_simplified(prompt, model="GPT-4.1", system_prompt="", chat_history=None):
     """
     Gets a response using the client.responses.create format.
     NOTE: This is NON-STREAMING and handles history/system prompt crudely.