LangChain

pip install langchain-openai

import os
from langchain_openai import ChatOpenAI

chat = ChatOpenAI(
    base_url="https://anyrouter.dev/api/v1",
    api_key=os.environ["ANYROUTER_API_KEY"],
    model="anyrouter/free",
)

response = chat.invoke("What is a fallback route? Answer in one sentence.")
print(response.response_metadata.get("model_name"))  # the model that served it
print(response.content)

npm install @langchain/openai @langchain/core

import { ChatOpenAI } from "@langchain/openai"

const chat = new ChatOpenAI({
  model: "anyrouter/free",
  apiKey: process.env.ANYROUTER_API_KEY,
  configuration: { baseURL: "https://anyrouter.dev/api/v1" },
})

const response = await chat.invoke("Explain DNS load balancing in one sentence.")
console.log(response.response_metadata.model_name) // the model that served it
console.log(response.content)