Changed the text generation model

app.py

@@ -69,7 +69,7 @@ def get_vectorstore(text_chunks, index):
 
 
 def get_conversation_chain(vectorstore):
-    llm = HuggingFaceHub(repo_id="google/flan-t5-xxl", model_kwargs={"temperature":0.2, "max_length":1024})
+    llm = HuggingFaceHub(repo_id="mistralai/Mistral-7B-v0.1", model_kwargs={"temperature":0.2, "max_length":1024})
 
     memory = ConversationBufferMemory(
         memory_key='chat_history', return_messages=True)