Update app.py

app.py

@@ -20,7 +20,7 @@ from huggingface_hub import login, InferenceClient
 # --- Constants ---
 DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
-model_id = "google/gemma-3-4b-it"
+model_id = "huggingface-projects/llama-2-13b-chat"
 
 def get_file_path(task_id: str, question) -> str:
     """Retrieves reference file path."""