Update app.py

app.py

@@ -1,6 +1,6 @@
 from typing import List
 from pathlib import Path
-from langchain_openai import ChatOpenAI, OpenAIEmbeddings
+from langchain_huggingface import ChatHuggingFace, HuggingFaceEmbeddings
 from langchain.prompts import ChatPromptTemplate
 from langchain.schema import StrOutputParser
 from langchain_community.document_loaders import (
@@ -19,7 +19,7 @@ import chainlit as cl
 chunk_size = 1024
 chunk_overlap = 50
 
-embeddings_model = OpenAIEmbeddings()
+embeddings_model = HuggingFaceEmbeddings()
 
 PDF_STORAGE_PATH = "./pdfs"
 
@@ -56,7 +56,7 @@ def process_pdfs(pdf_storage_path: str):
 
 
 doc_search = process_pdfs(PDF_STORAGE_PATH)
-model = ChatOpenAI(model_name="gpt-4", streaming=True)
+model = ChatHuggingFace(model_name="Mixtral-8x7b-Instruct", streaming=True)
 
 
 @cl.on_chat_start