Update app.py

app.py

@@ -47,7 +47,7 @@ def query_data(query,openai_api_key,mongo_uri):
     # Load "stuff" documents chain. Stuff documents chain takes a list of documents,
     # inserts them all into a prompt and passes that prompt to an LLM.
 
-    qa = RetrievalQA.from_chain_type(llm, chain_type="stuff", retriever=retriever)
+    qa = RetrievalQA.from_chain_type(llm, chain_type="stuff", retriever=retriever, model_name='gpt-4-1106-preview')
 
     # Execute the chain