Changing model to gpt-4o due to phase out of gpt-3.5

app.py

@@ -108,7 +108,7 @@ else:
 
 # Initialize conversational retrieval chain
 retriever = vectors.as_retriever(search_type="similarity", search_kwargs={"k": 6, "include_metadata": True, "score_threshold": 0.6})
-chain = ConversationalRetrievalChain.from_llm(llm=ChatOpenAI(temperature=0.5, model_name='gpt-3.5-turbo-0125', openai_api_key=openai_api_key), 
+chain = ConversationalRetrievalChain.from_llm(llm=ChatOpenAI(temperature=0.5, model_name='gpt-4o-mini', openai_api_key=openai_api_key), 
                                               retriever=retriever, return_source_documents=True, verbose=True, chain_type="stuff",
                                               max_tokens_limit=4097, combine_docs_chain_kwargs={"prompt": prompt})
 
@@ -152,7 +152,7 @@ if "uuid" not in st.session_state:
     st.session_state["uuid"] = str(uuid.uuid4())
 
 if "openai_model" not in st.session_state:
-    st.session_state["openai_model"] = "gpt-3.5-turbo-0125"
+    st.session_state["openai_model"] = "gpt-4o-mini"
 
 if "messages" not in st.session_state:
     st.session_state.messages = []