Vercel AI SDK

The TypeScript toolkit for building streaming AI apps and agents.

The Vercel AI SDK is an open-source TypeScript library for building AI-powered applications with a unified API across model providers and first-class streaming UI helpers for React, Svelte, and Vue. It standardizes text generation, structured outputs, tool calling, and agentic loops so the same code can target many models. It is the de facto standard for adding LLM features to JavaScript and Next.js apps.