chatopenai from langchain

app.py

@@ -21,7 +21,7 @@ from langchain.agents import initialize_agent, AgentType
 # from langchain_community.chat_models import ChatHuggingFace
 # import openai
 # from openai import OpenAI
-from langchain_openai import OpenAI
+from langchain_openai import ChatOpenAI
 
 ## # Load environment variables from .env file
 # --- Constants ---
@@ -280,7 +280,7 @@ llm = HuggingFaceEndpoint(
 )
 chat_llm = ChatHuggingFace(llm=llm)
 '''
-llm = OpenAI(
+llm = ChatOpenAI(
     openai_api_key=OPENAI_KEY,
     model_name=OPENAI_MODEL,
     temperature=0.1