---
sidebar_label: Anthropic Functions
---

# Anthropic Functions

LangChain offers an experimental wrapper around Anthropic that gives it the same API as OpenAI Functions.

## Setup

First, you'll need to install the popular [`fast-xml-parser`](https://www.npmjs.com/package/fast-xml-parser) package as a peer dependency:

```bash npm2yarn
npm install fast-xml-parser
```

## Initialize model

You can initialize this wrapper the same way you'd initialize a standard `ChatAnthropic` instance:

```typescript
import { AnthropicFunctions } from "langchain/experimental/chat_models/anthropic_functions";

const model = new AnthropicFunctions({
  temperature: 0.1,
  anthropicApiKey: "YOUR-API-KEY", // In Node.js defaults to process.env.ANTHROPIC_API_KEY
});
```

## Passing in functions

You can now pass in functions the same way as OpenAI:

import CodeBlock from "@theme/CodeBlock";
import AnthropicFunctionsCalling from "@examples/models/chat/anthropic_functions/function_calling.ts";

<CodeBlock language="typescript">{AnthropicFunctionsCalling}</CodeBlock>

## Using for extraction

import AnthropicFunctionsExtraction from "@examples/models/chat/anthropic_functions/extraction.ts";

<CodeBlock language="typescript">{AnthropicFunctionsExtraction}</CodeBlock>