up model size

app.py

@@ -22,8 +22,8 @@ arg_dict = {
     'demo_public': False, 
     # 'model_name_or_path': 'facebook/opt-125m', 
     # 'model_name_or_path': 'facebook/opt-1.3b', 
-    'model_name_or_path': 'facebook/opt-2.7b', 
-    # 'model_name_or_path': 'facebook/opt-6.7b',
+    # 'model_name_or_path': 'facebook/opt-2.7b', 
+    'model_name_or_path': 'facebook/opt-6.7b',
     'prompt_max_length': None, 
     'max_new_tokens': 200, 
     'generation_seed': 123,