replace HfAPI with LiteLLM due to payment issue

app.py

@@ -10,14 +10,18 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 
 # --- Basic Agent Definition ---
 # ----- THIS IS WERE YOU CAN BUILD WHAT YOU WANT ------
-from smolagents import CodeAgent, DuckDuckGoSearchTool, OpenAIServerModel, VLLMModel, HfApiModel
+from smolagents import CodeAgent, DuckDuckGoSearchTool, OpenAIServerModel, VLLMModel, HfApiModel, LiteLLMModel
 
 
 class BasicAgent:
     def __init__(self):
         # model = OpenAIServerModel(model_id="gpt-4o")
         # model = VLLMModel(model_id="HuggingFaceTB/SmolLM-135M-Instruct")
-        model = HfApiModel("Qwen/Qwen2.5-Coder-32B-Instruct")
+        model = LiteLLMModel(
+            model_id="Qwen/Qwen2.5-Coder-32B-Instruct",
+            num_ctx=8192,
+        )
+        # model = HfApiModel("Qwen/Qwen2.5-Coder-32B-Instruct")
         self.agent = CodeAgent(tools=[DuckDuckGoSearchTool()], model=model)
         print("BasicAgent initialized.")
     def __call__(self, question: str) -> str: