Update app.py

app.py

@@ -30,7 +30,7 @@ def summarize_pdf(file, openai_api_key):
     vector_store = FAISS.from_documents(documents, embeddings)
 
     # Create a RetrievalQA chain for summarization
-    llm = ChatOpenAI(model="gpt-4")  # Using GPT-4 as the LLM
+    llm = ChatOpenAI(model="gpt-4o")  # Using GPT-4 as the LLM
     qa_chain = RetrievalQA.from_chain_type(
         llm=llm,
         chain_type="stuff",