Updated delta

app.py

@@ -46,7 +46,7 @@ def model_chat(query: Optional[str], history: Optional[History]) -> Generator[Tu
     messages.append({'role': 'assistant', 'content': ''})
     for completion in gen:
         print(completion)
-        text = completion.choices[0].content
+        text = completion.choices[0].delta.content
         messages[-1]['content'] += text
         history = messages_to_history(messages)
         yield '', history