Update app.py

app.py

@@ -45,7 +45,7 @@ Choose the most appropriate response structure and generate the response directl
 class AdvancedPdfChatbot:
     def __init__(self, openai_api_key):
         os.environ["OPENAI_API_KEY"] = openai_api_key
-        self.llm = ChatOpenAI(temperature=0.2, model_name='gpt-4o-mini')
+        self.llm = ChatOpenAI(temperature=0.2, model_name='gpt-4o')
         
         self.embeddings = OpenAIEmbeddings()
         self.text_splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=200)