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The AI Toolkit for TypeScript. From the creators of Next.js, the AI SDK is a free open-source library for building AI-powered applications and agents

AI ChatbotsFreeFree tier
Inputs: text, image, videoOutputs: text, image, video
Type
Open Source
Company
Vercel
Visit Website GitHub (24.0k stars)

About ai

The AI SDK is a free, open-source TypeScript library by Vercel that provides a unified API for building AI-powered applications and agents. It supports multiple AI providers (OpenAI, xAI, etc.), real-time streaming, built-in fallbacks, and integrates with frameworks like React, Next.js, Vue, Svelte, and Node.js. The SDK includes core modules for text generation, image generation, speech transcription, video generation, tool calling, and error handling, plus UI hooks for chat and generative interfaces. With over 18 million weekly downloads, 25,000+ GitHub stars, and support for 100+ models, it's designed for production-scale AI apps.

Key Features

Unified TypeScript API for multiple AI providers (OpenAI, xAI, Grok, etc.)
Real-time streaming responses without custom parsing
Built-in fallbacks for reliable production behavior
Framework-agnostic: works with React, Next.js, Vue, Svelte, Node.js
Support for text, image, speech, and video generation
Tool calling and error handling built in
AI SDK UI hooks for chat and generative user interfaces
AI SDK Core for structured objects and agents
Vercel AI Gateway for 100+ models with no markup
Vercel Sandbox for secure agent code execution at scale

Pros & Cons

Pros
  • Free and open-source with an active community (18M weekly downloads, 25K GitHub stars)
  • Multi-provider support with one-line switching
  • Real-time streaming works out of the box
  • Built-in fallbacks ensure reliability in production
  • Framework-agnostic, works with popular JavaScript frameworks
  • Comprehensive tooling: playground, dev tools, UI hooks, workflows
  • Backed by Vercel, ensuring ongoing development and stability
Cons
  • Limited to TypeScript/JavaScript ecosystem, no native client for other languages yet (Python beta available)
  • Requires familiarity with JavaScript/TypeScript and modern web frameworks
  • Some advanced features (e.g., workflows, sandbox) may require additional setup or Vercel ecosystem

Best For

Building AI-powered chatbots with persistence and multi-modal chatCreating Slackbot agents that respond to messages and mentionsDeveloping SQL agents that interact with databases using natural languageBuilding generative user interfaces with chat and streamingConstructing agents with 40+ tools, resumable streams, and multi-step reasoningIntegrating AI into existing web frameworks (React, Next.js, Vue, Svelte)

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FAQ

What is the AI SDK?
The AI SDK is a free, open-source TypeScript library by Vercel that provides a unified API for building AI-powered applications and agents with support for multiple AI providers, streaming, and fallbacks.
How do I get started?
Install via npm: npm i ai. Then generate text or create chatbots using the provided core API and UI hooks. Detailed recipes and templates are available in the documentation.
Which AI providers are supported?
The AI SDK supports over 100 models via more than 16 providers including OpenAI, xAI (Grok), and others. You can switch providers with one line of code.
Is the AI SDK only for TypeScript?
The primary version is for TypeScript/JavaScript, but an AI SDK for Python is currently in beta.
Can I use it with frameworks other than React?
Yes, it is framework-agnostic and works with React, Next.js, Vue, Svelte, Node.js, and more.