feat: LLM agent model change

inference.py

@@ -41,7 +41,7 @@ if HF_TOKEN is None:
     raise ValueError("HF_TOKEN environment variable is required")
 API_KEY          = HF_TOKEN or os.getenv("API_KEY")
 API_BASE_URL     = os.getenv("API_BASE_URL", "https://router.huggingface.co/v1")
-MODEL_NAME       = os.getenv("MODEL_NAME", "Qwen/Qwen2.5-72B-Instruct")
+MODEL_NAME       = os.getenv("MODEL_NAME", "meta-llama/Llama-3.3-70B-Instruct")
 USE_LOCAL        = os.getenv("USE_LOCAL", "false").lower() == "true"
 MAX_STEPS        = 8
 TEMPERATURE      = 0.3