fix gemini model

codes/1_planning.py

@@ -14,7 +14,7 @@ parser.add_argument('--paper_name', type=str, help='Name of the paper (deprecate
 parser.add_argument('--blog_name', type=str, help='Name of the blog')
 parser.add_argument('--content_name', type=str, help='Name of the content (paper or blog)')
 parser.add_argument('--gpt_version', type=str, help='Model version (deprecated, use --model)')
-parser.add_argument('--model', type=str, help='Model name (e.g., gpt-4o-mini, gemini-1.5-flash)')
+parser.add_argument('--model', type=str, help='Model name (e.g., gpt-4o-mini, gemini-2.0-flash)')
 parser.add_argument('--provider', type=str, default='gemini', choices=['openai', 'gemini', 'gemma'], help='LLM provider to use')
 parser.add_argument('--paper_format', type=str, default="JSON", choices=["JSON", "LaTeX"], help='Format for papers')
 parser.add_argument('--blog_format', type=str, default="JSON", choices=["JSON", "Markdown", "HTML"], help='Format for blogs')

codes/llm_provider.py

@@ -79,7 +79,7 @@ class OpenAIProvider(LLMProvider):
 
 
 class GeminiProvider(LLMProvider):
-    """Google Gemini API implementation"""
+    """Google Gemini API implementat`ion"""
     
     def __init__(self, api_key: Optional[str] = None):
         try:
@@ -262,7 +262,7 @@ def get_default_model(provider_name: str) -> str:
     """Get default model for a provider"""
     defaults = {
         'openai': 'gpt-4o-mini',
-        'gemini': 'gemini-1.5-flash',   # valid, free tier, no models/ prefix needed
+        'gemini': 'gemini-2.0-flash',   # valid, free tier, no models/ prefix needed
         'gemma': 'google/gemma-3-27b-it',
     }
     return defaults.get(provider_name, 'gpt-4o-mini')