Update app.py

app.py

@@ -56,7 +56,7 @@ def query_pdf(file, user_query, openai_api_key):
     vector_store = FAISS.from_documents(documents, embeddings)
 
     # Create a conversational chain that allows us to query the document
-    llm = ChatOpenAI(model="gpt-4")  # Using GPT-4 as the LLM
+    llm = ChatOpenAI(model="gpt-4o")  # Using GPT-4 as the LLM
     conversational_chain = ConversationalChain(
         llm=llm,
         vectorstore=vector_store,