The AI layer for building frameworks and agents on Vercel

A unified TypeScript SDK for building AI apps with modern streaming, multi-model, and provider-agnostic capabilities

npm i ai

import { generateText } from 'ai';

const { text } = await generateText({
  model: 'openai/gpt-5.5',
  prompt: 'Explain the concept of quantum entanglement.',
});

console.log(text);

The Framework Agnostic AI Toolkit

The open-source AI toolkit designed to help developers build AI-powered applications and agents with React, Next.js, Vue, Svelte, Node.js, and more.

Multi-provider support. Switch providers with one line of code.

Streaming that just works. Real-time responses without custom parsing.

Built-in fallbacks.
Reliable production behavior by default.

Run it with

import { generateText } from 'ai';

const { text } = await generateText({
  model: 'openai/gpt-5.5',
  prompt: 'Explain the concept of quantum entanglement.',
});

console.log(text);

Go to playground

Supports

+ 16 providers

Scale with confidence

Plug the AI SDK into an entire ecosystem designed for the way modern AI applications that scale.

Vercel AI Gateway

Access 100+ models with no markup or having to manage multiple API keys.

npm i ai

Vercel Sandbox

Run agent generated code securely and at scale.

npm i @vercel/sandbox

Workflows New

Build long running AI agents and apps that can suspend, resume, and survive function timeouts.

npm i workflow

AI Elements

A UI component library and custom registry built to build AI-native applications faster.

npx ai-elements

We built a full AI agent with 40+ tools, resumable streams, and multi-step reasoning on AI SDK. Every hard problem we'd solved with duct tape before, streaming, tool call repair, message management, tool based UI, they already had a clean API for. It feels like their team hit every wall we did, just before us.

Adir DuchanSenior AI Engineer