Update app.py

app.py

@@ -41,8 +41,8 @@ def get_vectorstore(text_chunks):
 
 
 def get_conversation_chain(vectorstore):
-    #llm = ChatOpenAI()
-    llm = HuggingFaceHub(repo_id="google/flan-t5-xxl", model_kwargs={"temperature":0.5, "max_length":512})
+    llm = ChatOpenAI()
+    #llm = HuggingFaceHub(repo_id="google/flan-t5-xxl", model_kwargs={"temperature":0.5, "max_length":512})
 
     memory = ConversationBufferMemory(
         memory_key='chat_history', return_messages=True)