Update GAIA agent

Improve the agent logic and add web search capabilities for GAIA evaluation.

app.py

@@ -3,6 +3,7 @@ import gradio as gr
 import requests
 import inspect
 import pandas as pd
+from smolagents import CodeAgent, HfApiModel, DuckDuckGoSearchTool
 
 # (Keep Constants as is)
 # --- Constants ---
@@ -12,12 +13,46 @@ DEFAULT_API_URL = "https://agents-course-unit4-scoring.hf.space"
 # ----- THIS IS WERE YOU CAN BUILD WHAT YOU WANT ------
 class BasicAgent:
     def __init__(self):
-        print("BasicAgent initialized.")
+        print("Initializing GAIA Agent...")
+
+        self.model = HfApiModel()
+
+        self.agent = CodeAgent(
+            tools=[
+                DuckDuckGoSearchTool(max_results=8),
+            ],
+            model=self.model,
+            max_steps=10,
+        )
+
     def __call__(self, question: str) -> str:
-        print(f"Agent received question (first 50 chars): {question[:50]}...")
-        fixed_answer = "This is a default answer."
-        print(f"Agent returning fixed answer: {fixed_answer}")
-        return fixed_answer
+        print(f"Agent received question: {question[:100]}...")
+
+        prompt = f"""
+You are solving a GAIA benchmark question.
+
+Solve the question carefully and completely.
+Use web search whenever factual information or research is needed.
+
+IMPORTANT:
+- Return ONLY the final answer.
+- Do not write "FINAL ANSWER".
+- Do not add explanations.
+- Follow the exact format requested by the question.
+
+Question:
+{question}
+"""
+
+        try:
+            result = self.agent.run(prompt)
+            answer = str(result).strip()
+            print(f"Agent returned: {answer}")
+            return answer
+
+        except Exception as e:
+            print(f"Agent error: {e}")
+            return f"ERROR: {e}"
 
 def run_and_submit_all( profile: gr.OAuthProfile | None):
     """