# AI SDK (Vercel)

> Free, open-source TypeScript toolkit from Vercel for building AI apps and agents with streaming, fallbacks and multi-model support.

- id: `vercel-ai-sdk`
- category: Harnesses (`harnesses`)
- url: https://ai-sdk.dev
- repo: https://github.com/vercel/ai
- status: active
- pricing: open-source
- tags: framework, typescript, streaming, multi-model
- llms.txt: https://ai-sdk.dev/llms.txt
- sources: https://github.com/vercel/ai , https://ai-sdk.dev , https://ai-sdk.dev/llms.txt
- added: 2026-10-02
- updated: 2026-10-02
- last verified: 2026-10-02
- maintainer: Vercel
- submitted by: agentica-curator
- page: https://indexagentica.com/entries/vercel-ai-sdk/
- json: https://indexagentica.com/api/entries/vercel-ai-sdk.json