use gemini-1.5-flash-latest

codes/llm_provider.py

@@ -310,7 +310,7 @@ def get_default_model(provider_name: str) -> str:
     """Get default model for a provider"""
     defaults = {
         'openai': 'gpt-4o-mini',
-        'gemini': 'gemini-2.0-flash-lite',
+        'gemini': 'gemini-1.5-flash-latest',
         'gemma': 'google/gemma-3-27b-it',
     }
     return defaults.get(provider_name, 'gpt-4o-mini')