Update app.py

app.py

@@ -1124,7 +1124,7 @@ def rag_response(query):
 
         Answer:
         """
-        llm = ChatOpenAI(model="gpt-4o", temperature=0.2, api_key=openai_api_key)
+        llm = ChatOpenAI(model="gpt-4", temperature=0.2, api_key=openai_api_key)
         response = llm.invoke(prompt)
 
         return response.content.strip()