Update app.py

app.py

@@ -47,7 +47,7 @@ chain_type_kwargs = {"prompt": prompt}
 
 @cl.author_rename
 def rename(orig_author: str):
-    rename_dict = {"RetrievalQA": "Thinking.."}
+    rename_dict = {"Just a moment": "Thinking.."}
     return rename_dict.get(orig_author, orig_author)
 
 @cl.on_chat_start
@@ -71,7 +71,7 @@ async def init():
     docsearch = await cl.make_async(FAISS.from_documents)(documents, embedder)
 
     chain = RetrievalQA.from_chain_type(
-        ChatOpenAI(model="gpt-3.5-turbo", temperature=0.7, streaming=True),
+        ChatOpenAI(model="gpt-4", temperature=0.7, streaming=True),
         chain_type="stuff",
         return_source_documents=True,
         retriever=docsearch.as_retriever(),