AttributeError: 'OpenAI' object has no attribute 'bind_tools' while creating a React Agent in LangGraph

Question

I'm trying to create a custom agent using langgraph and OpenAI in my Python project, but I'm encountering an error when using the create_react_agent function. Here's the code snippet that is causing the issue:

`import os
from dotenv import load_dotenv
from langchain_community.utilities import GoogleSerperAPIWrapper
from langchain_openai import OpenAI
from langgraph.prebuilt import create_react_agent

load_dotenv()

openai_api_key = os.getenv("OPENAI_API_KEY")
serper_api_key = os.getenv("SERPER_API_KEY")

llm = OpenAI(temperature=0, openai_api_key=openai_api_key, model="gpt-4o-mini")
search = GoogleSerperAPIWrapper()

tools = [
    Tool(
        name="Intermediate Answer",
        func=search.run,
        description="useful for when you need to ask with search",
    )
]

graph = create_react_agent(llm, tools=tools)

inputs = {"messages": [("user", "what is the hometown of the reigning men's U.S. Open champion?")]}
response = graph.stream(inputs, stream_mode="values")
`

However, when running the code, I encounter the following error:

 AttributeError: 'OpenAI' object has no attribute 'bind_tools'

This issue arises after the following line:

graph = create_react_agent(llm, tools=tools)

I suspect it might be related to the way OpenAI is interacting with langgraph or the create_react_agent function. I also receive a deprecation warning when using from langchain.agents import AgentType, Tool, initialize_agent.

What I've tried: Using the OpenAI model directly as shown in the code. Verifying that the API keys for both OPENAI_API_KEY and SERPER_API_KEY are correctly set in the .env file. Checking the documentation for the correct usage of langgraph. Any help would be appreciated in resolving this issue. How can I fix the 'bind_tools' error and successfully create a React agent using langgraph?

Cristóbal Bergillos Navarro · Accepted Answer · 2025-01-27 12:12:34Z

2

If you want to use tools with your model, you need to use ChatOpenAI instead of OpenAI. Update your code as follows:

from langchain_openai import ChatOpenAI

llm = ChatOpenAI(temperature=0, api_key=openai_api_key, model="gpt-4o-mini")

answered Jan 27 at 12:12

Cristóbal Bergillos Navarro

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Kavya Goyal · Accepted Answer · 2025-02-02 20:18:09Z

0

Typescript Version

import { ChatOpenAI } from "@langchain/openai";
    
const model = new ChatOpenAI({apiKey: process.env.OPEN_AI_API_KEY, model: "gpt-4o-mini"});
      
# The TS equivalent is bindTools and not bind_tools
model.bindTools(tools);

answered Feb 2 at 20:18

Kavya Goyal

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