Update app.py

app.py

@@ -15,7 +15,7 @@ os.environ['OPENAI_API_KEY'] = os.getenv("Your_API_Key")
 last_interaction_time = 0
 
 def loading_pdf():
-    return "Working on the upload. Also, pondering the usefulness of sporks..."
+    return "Working on the upload. Also, pondering why humans don't use sporks more..."
 
 def pdf_changes(pdf_doc):
     try:
@@ -32,7 +32,7 @@ def pdf_changes(pdf_doc):
         retriever = db.as_retriever()
         global qa
         qa = ConversationalRetrievalChain.from_llm(
-            llm=OpenAI(temperature=0.2, model_name="gpt-4", max_tokens=-1, n=2),
+            llm=OpenAI(temperature=0.2, model_name="gpt-4o", max_tokens=-1, n=2),
             retriever=retriever,
             return_source_documents=False
         )