Update app.py

app.py

@@ -19,7 +19,7 @@ class AdvancedPdfChatbot:
         os.environ["OPENAI_API_KEY"] = openai_api_key
         self.embeddings = OpenAIEmbeddings()
         self.text_splitter = RecursiveCharacterTextSplitter(chunk_size=1000, chunk_overlap=200)
-        self.llm =  ChatOpenAI(temperature=0,model_name='gpt-4o-mini')
+        self.llm =  ChatOpenAI(temperature=0.5,model_name='gpt-4o')
         
         self.memory = ConversationBufferMemory(memory_key="chat_history", return_messages=True)
         self.qa_chain = None