Update app.py

app.py

@@ -29,7 +29,7 @@ docs = PyMuPDFLoader(direct_url).load()
 
 import tiktoken
 def tiktoken_len(text):
-    tokens = tiktoken.encoding_for_model("gpt-4").encode(
+    tokens = tiktoken.encoding_for_model("gpt-3.5-turbo").encode(
         text,
     )
     return len(tokens)
@@ -63,8 +63,7 @@ qdrant_vectorstore = Qdrant.from_documents(
 qdrant_retriever = qdrant_vectorstore.as_retriever()
 
 from langchain_openai import ChatOpenAI
-openai_chat_model = ChatOpenAI(model="gpt-4-turbo")
-#openai_chat_model = ChatOpenAI(model="gpt-3.5-turbo")
+openai_chat_model = ChatOpenAI(model="gpt-3.5-turbo")
 
 from langchain_core.prompts import ChatPromptTemplate
 
@@ -124,7 +123,7 @@ retrieval_augmented_qa_chain = (
 @cl.on_chat_start
 async def start_chat():
     settings = {
-        "model": "gpt-4-turbo",
+        "model": "gpt-3.5-turbo",
         "temperature": 0,
         "max_tokens": 500,
         "top_p": 1,