Update app.py

app.py

@@ -625,7 +625,7 @@ texts = text_splitter.split_text(state_of_the_union)
 
 embeddings = OpenAIEmbeddings()
 vectorstore = FAISS.from_texts(texts, embeddings)
-qa = VectorDBQA.from_chain_type(llm=OpenAI(model_name="gpt-3.5-turbo", temperature=0, max_tokens=256), chain_type="stuff", vectorstore=vectorstore)
+qa = VectorDBQA.from_chain_type(llm=OpenAI(model_name="text-davinci-002", temperature=0, max_tokens=256), chain_type="stuff", vectorstore=vectorstore)
 #llm = ChatOpenAI(model_name="gpt-3.5-turbo", temperature=0, max_tokens=256)  # Modify model_name if you have access to GPT-4