TanStack AI
What is TanStack AI
TanStack AI is a framework-agnostic, provider-agnostic AI SDK for building multi-modal AI applications. It positions itself as the "Switzerland of AI tooling" — open-source, no vendor lock-in, no hosted platform required. Built by the same team behind TanStack Query and TanStack Router.
- Version: Beta (June 2026)
- License: MIT
- Downloads: ~98K weekly / 7.1M total
- GitHub stars: 2.8K
Why it's interesting
- Protocol-first architecture — built on the AG-UI protocol, not a proprietary wire format.
- Multi-modal from day one — typed primitives for text, images, audio, video, voice chat, and structured output.
- Per-model type safety — each provider model's options and capabilities are typed individually. Incompatible tool calls caught at compile time.
- Provider portability — switching from OpenAI to Anthropic is a one-line import change. Adapters for OpenAI, Anthropic, Gemini, Groq, Ollama, OpenRouter, xAI, ElevenLabs, fal.ai.
- Observable runtime — built-in devtools, middleware for logging/caching/guarding, tool approvals.
- Framework-agnostic client — React, Vue, Solid, Svelte, Preact, vanilla JS.
When to use
- AI-powered apps that need provider flexibility (avoid vendor lock-in)
- Multi-modal applications (text + image + audio + video in the same app)
- Teams already invested in the TanStack ecosystem (Query, Router, Virtual)
- Projects where type safety and compile-time checks on AI interactions matter
When NOT to use
- Teams heavily invested in Vercel/Next.js where Vercel AI SDK's native integration provides more value
- Production apps that need a fully stable (non-beta) SDK today
- Simple single-provider chat UIs where a lighter solution suffices
Comparison to Vercel AI SDK
TanStack AI and Vercel AI SDK solve the same core problem (AI UI primitives) with different philosophies:
| TanStack AI | Vercel AI SDK | |
|---|---|---|
| Ecosystem coupling | None — bring your own backend | Optimized for Vercel/Next.js |
| Protocol | AG-UI (open standard) | Proprietary wire format |
| Maturity | Beta (June 2026) | Stable (v6.x, 13M weekly downloads) |
| Type safety | Per-model typed options | Provider-level types |
| Modalities | All first-class from day one | Text/image/audio/video supported |