Update app.py

app.py

@@ -6,7 +6,7 @@ from langchain.text_splitter import CharacterTextSplitter
 from langchain.document_loaders import TextLoader
 from langchain.chains import RetrievalQA
 import os
-llm = HuggingFaceHub(repo_id="google/flan-t5-xxl")
+llm = HuggingFaceHub(repo_id="HuggingFaceH4/zephyr-7b-beta")
 embeddings = HuggingFaceEmbeddings()
 loader = TextLoader('us.txt')
 documents = loader.load()