> ## Documentation Index
> Fetch the complete documentation index at: https://docs.langchain.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Yandexgpt integration

> Integrate with the Yandexgpt LLM using LangChain JavaScript.

LangChain.js supports calling [YandexGPT](https://cloud.yandex.com/en/services/yandexgpt) LLMs.

## Setup

First, you should [create service account](https://cloud.yandex.com/en/docs/iam/operations/sa/create) with the `ai.languageModels.user` role.

Next, you have two authentication options:

* [IAM token](https://cloud.yandex.com/en/docs/iam/operations/iam-token/create-for-sa).
  You can specify the token in a constructor parameter `iam_token` or in an environment variable `YC_IAM_TOKEN`.
* [API key](https://cloud.yandex.com/en/docs/iam/operations/api-key/create)
  You can specify the key in a constructor parameter `api_key` or in an environment variable `YC_API_KEY`.

## Usage

<Tip>
  See [this section for general instructions on installing LangChain packages](/oss/javascript/langchain/install).
</Tip>

```bash npm theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
npm install @langchain/yandex @langchain/core
```

```typescript theme={"theme":{"light":"catppuccin-latte","dark":"catppuccin-mocha"}}
import { YandexGPT } from "@langchain/yandex/llms";

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

## Related

* [Models guide](/oss/javascript/langchain/models)

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