Update g4f/models.py

g4f/models.py

@@ -14,7 +14,7 @@ class Model:
     class gpt_35_turbo_16k:
         name: str = 'gpt-3.5-turbo-16k'
         base_provider: str = 'openai'
-        best_provider: Provider.Provider = Provider.ChatFree
+        best_provider: Provider.Provider = Provider.Liaobots
 
     class gpt_4_dev:
         name: str = 'gpt-4-for-dev'
@@ -24,7 +24,7 @@ class Model:
     class gpt_4:
         name: str = 'gpt-4'
         base_provider: str = 'openai'
-        best_provider: Provider.Provider = Provider.Ava
+        best_provider: Provider.Provider = Provider.Liaobots
 
     class gpt_4_assistant:
         name: str = 'gpt-4'