Update app.py

app.py

@@ -104,7 +104,7 @@ def get_conversation_chain(vectorstore):
         A conversational retrieval chain for generating responses.
 
     """
-    llm = ChatOpenAI(temperature=0, model="gpt-3.5-turbo-0125")
+    llm = ChatOpenAI(temperature=0, model="gpt-4o-mini")
 
     memory = ConversationBufferMemory(memory_key="chat_history", return_messages=True)
     conversation_chain = ConversationalRetrievalChain.from_llm(