AI SDK - Anthropic Provider

The Anthropic provider for the AI SDK contains language model support for the Anthropic Messages API.

Setup

The Anthropic provider is available in the @ai-sdk/anthropic module. You can install it with

npm i @ai-sdk/anthropic

Provider Instance

You can import the default provider instance anthropic from @ai-sdk/anthropic:

import { anthropic } from '@ai-sdk/anthropic';

Example

import { anthropic } from '@ai-sdk/anthropic';
import { generateText } from 'ai';

const { text } = await generateText({
  model: anthropic('claude-3-haiku-20240307'),
  prompt: 'Write a vegetarian lasagna recipe for 4 people.',
});

Documentation

Please check out the Anthropic provider documentation for more information.

Development & Testing

OAuth Authentication Support

This provider supports Claude Code OAuth authentication. When CLAUDE_CODE_OAUTH_TOKEN is set, the provider automatically:

• Uses Bearer authentication instead of API key
• Adds Claude Code specific headers and beta flags
• Includes ?beta=true URL parameter
• Enables debug logging with CLAUDE_CODE_DEBUG=true

Test Commands

# Run unit tests
pnpm test

# Test with demo OAuth token (shows headers, will fail with invalid token)
pnpm test:app

# Test with real OAuth token (requires CLAUDE_CODE_OAUTH_TOKEN)
export CLAUDE_CODE_OAUTH_TOKEN=your-token
pnpm test:app:real

Debug Logging

Enable request logging by setting debug flags:

export CLAUDE_CODE_DEBUG=true
# or
export ANTHROPIC_DEBUG=true

This will log all request URLs and headers to the console.