Update app.py

app.py

@@ -71,6 +71,7 @@ def stream_chat(message: Dict[str, str], history: list):
         pixel_values=pixel_values,
         streamer=streamer,
         max_new_tokens=256,
+        do_sample=True,
     )
 
     t = Thread(target=model.generate, kwargs=generate_kwargs)