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vercel/ai

A provider-agnostic TypeScript toolkit for building AI-powered applications and agents with React, Next.js, Svelte, Vue and Node.js.

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What is it?

The AI SDK is a TypeScript library for building AI-powered applications and agents. It offers a unified API across model providers such as OpenAI, Anthropic and Google, so switching models mostly means changing a model string or provider package rather than rewriting application code.

Beyond plain text generation, it supports generating structured data validated against a schema (using Zod), tool-using agents through a ToolLoopAgent abstraction, and streaming responses. By default, model strings are routed through the Vercel AI Gateway, while provider packages such as @ai-sdk/openai can be used to connect directly.

The AI SDK UI module provides hooks such as useChat for building chat interfaces and generative UI. These hooks are framework-agnostic and work with Next.js, React, Svelte and Vue.

Key features

  • 01Unified API across model providers such as OpenAI, Anthropic and Google.
  • 02Structured output generation validated with Zod schemas.
  • 03ToolLoopAgent abstraction for building tool-using agents.
  • 04UI hooks such as useChat for chat and generative interfaces.
  • 05Works with Next.js, React, Svelte, Vue and Node.js runtimes.

Use cases

  • Adding a chat interface with streaming responses to a Next.js or React app.
  • Extracting structured JSON from model output in a TypeScript backend.
  • Building agents that call tools such as shell commands or image generation.

Quick start

  1. 1

    Install Node.js 22+ and npm, then install the AI SDK package

    npm install ai
  2. 2

    Install the provider SDK packages you want to use directly (optional)

    npm install @ai-sdk/openai @ai-sdk/anthropic @ai-sdk/google
  3. 3

    Call generateText with a model string in your code (uses Vercel AI Gateway by default)

Things to know

  • Default model routing goes through the Vercel AI Gateway, which may require a Vercel account or API key.
  • The README's example model names may not match the providers' currently available models, so check the docs before using them.

Topics

#typescript#llm#generative-ai#agents#react#nextjs#openai#anthropic#artificial-intelligence#gemini

FAQ

What is ai?
A provider-agnostic TypeScript toolkit for building AI-powered applications and agents with React, Next.js, Svelte, Vue and Node.js. The AI SDK is a TypeScript library for building AI-powered applications and agents. It offers a unified API across model providers such as OpenAI, Anthropic and Google, so switching models mostly means changing a model string or provider package rather than rewriting application code.
Is ai free to use? What license does it have?
ai is open source under the Other license. Check the license terms before using it in commercial products.
Is ai still maintained?
Actively maintained. The last commit to ai was on Oct 20, 2026.
What can I use ai for?
Adding a chat interface with streaming responses to a Next.js or React app. Extracting structured JSON from model output in a TypeScript backend. Building agents that call tools such as shell commands or image generation.
How do I install ai?
Install Node.js 22+ and npm, then install the AI SDK package: npm install ai Install the provider SDK packages you want to use directly (optional): npm install @ai-sdk/openai @ai-sdk/anthropic @ai-sdk/google Call generateText with a model string in your code (uses Vercel AI Gateway by default)
Where can I get ai?
The source code and installation instructions are on GitHub: https://github.com/vercel/ai

Summary generated by AI from the project's README. GitHub stats refresh daily.

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