> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-agents-1764703577-c40e9c2.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

All functionality related to OpenAI

> [OpenAI](https://en.wikipedia.org/wiki/OpenAI) is American artificial intelligence (AI) research laboratory
> consisting of the non-profit `OpenAI Incorporated`
> and its for-profit subsidiary corporation `OpenAI Limited Partnership`.
> OpenAI conducts AI research with the declared intention of promoting and developing a friendly AI.
> OpenAI systems run on an `Azure`-based supercomputing platform from `Microsoft`.

> The [OpenAI API](https://platform.openai.com/docs/models) is powered by a diverse set of models with different capabilities and price points.
>
> [ChatGPT](https://chat.openai.com) is the Artificial Intelligence (AI) chatbot developed by `OpenAI`.

## Installation and Setup

* Get an OpenAI api key and set it as an environment variable (`OPENAI_API_KEY`)

## Chat model

See a [usage example](/oss/javascript/integrations/chat/openai).

```typescript theme={null}
import { ChatOpenAI } from "@langchain/openai";
```

## LLM

See a [usage example](/oss/javascript/integrations/llms/openai).

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

```bash npm theme={null}
npm install @langchain/openai @langchain/core
```

```typescript theme={null}
import { OpenAI } from "@langchain/openai";
```

## Text Embedding Model

See a [usage example](/oss/javascript/integrations/text_embedding/openai)

```typescript theme={null}
import { OpenAIEmbeddings } from "@langchain/openai";
```

## Chain

```typescript theme={null}
import { OpenAIModerationChain } from "@langchain/classic/chains";
```

***

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