Adjusted error linked with the llm

app.py

@@ -7,9 +7,9 @@ import re
 import math
 import json
 import unicodedata
+from langchain_openai import ChatOpenAI
 from langgraph.prebuilt import create_react_agent
 from langchain_core.messages import SystemMessage
-from langchain_huggingface import ChatHuggingFace, HuggingFaceEndpoint
 from langchain_core.tools import tool
 from langchain_community.tools import DuckDuckGoSearchRun
 from langchain_community.utilities import WikipediaAPIWrapper
@@ -124,16 +124,14 @@ class BasicAgent:
     def __init__(self):
         print("Initializing LangGraph ReAct Agent with Llama 3.3 70B...")
  
-        llm_endpoint = HuggingFaceEndpoint(
-            repo_id="meta-llama/Llama-3.3-70B-Instruct",
-            huggingfacehub_api_token=os.getenv("HF_TOKEN"),
-            task="text-generation",
-            max_new_tokens=1024,
+        llm = ChatOpenAI(
+            model="Qwen/Qwen2.5-72B-Instruct",   # supporta tool calling
+            base_url="https://router.huggingface.co/v1",
+            api_key=os.getenv("HF_TOKEN"),
             temperature=0.1,
-            do_sample=False,
+            max_tokens=1024,
         )
-        llm = ChatHuggingFace(llm=llm_endpoint)
- 
+        
         tools = [
             web_search,
             wikipedia_search,