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LangChain.js supports calling YandexGPT LLMs.


First, you should create service account with the ai.languageModels.user role.

Next, you have two authentication options:

  • IAM token. You can specify the token in a constructor parameter iam_token or in an environment variable YC_IAM_TOKEN.
  • API key You can specify the key in a constructor parameter api_key or in an environment variable YC_API_KEY.


npm install @langchain/yandex
import { YandexGPT } from "@langchain/yandex/llms";

const model = new YandexGPT();
const res = await model.invoke(['Translate "I love programming" into French.']);
console.log({ res });

API Reference:

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