Open-source TypeScript toolkit for building AI apps and agents.
The Vercel AI SDK is an open-source TypeScript library that provides a unified API across model providers for text generation, structured output, tool calling, streaming UIs, and agent loops. It is framework-friendly (React, Next.js, Svelte, Vue) and widely used for building production AI applications and agents.
Open-source (Apache 2.0) and free; you pay only for the underlying model provider usage.