Check supports_stream in best_providers list

g4f/__init__.py

@@ -16,14 +16,17 @@ class ChatCompletion:
         auth     : Union[str, None]                = None, **kwargs: Any) -> Union[CreateResult, str]:
 
         if isinstance(model, str):
-            try:
+            if model in models.ModelUtils.convert:
                 model = models.ModelUtils.convert[model]
-            except KeyError:
+            else:
                 raise Exception(f'The model: {model} does not exist')
 
         if not provider:
             if isinstance(model.best_provider, list):
-                provider = random.choice(model.best_provider)
+                if stream:
+                    provider = random.choice([p for p in model.best_provider if p.supports_stream])
+                else:
+                    provider = random.choice(model.best_provider)
             else:
                 provider = model.best_provider
 

g4f/models.py

@@ -7,7 +7,6 @@ from .Provider   import (
     CodeLinkAva,
     ChatgptAi, 
     ChatBase, 
-    Yqcloud,
     Vercel, 
     DeepAi, 
     Aivvm, 
@@ -32,7 +31,7 @@ gpt_35_turbo = Model(
     name          = 'gpt-3.5-turbo',
     base_provider = 'openai',
     best_provider = [
-        Yqcloud, DeepAi, CodeLinkAva, ChatgptLogin, ChatgptAi, ChatBase, Aivvm
+        DeepAi, CodeLinkAva, ChatgptLogin, ChatgptAi, ChatBase, Aivvm
     ]
 )