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A powerful, type-safe AI SDK for building AI-powered applications.

• Provider-agnostic adapters (OpenAI, Anthropic, Gemini, Ollama, etc.)
• Multimodal content support - Send images, audio, video, and documents
• Chat completion, streaming, and agent loop strategies
• Headless chat state management with adapters (SSE, HTTP stream, custom)
• Isomorphic type-safe tools with server/client execution
• Enhanced integration with TanStack Start - Share implementations between AI tools and server functions

TanStack AI works withany framework (Next.js, Express, Remix, etc.).

With TanStack Start, you get a bonus: share implementations between AI tools and server functions withcreateServerFnTool:

import{createServerFnTool}from'@tanstack/ai-react'// Define once, get AI tool AND server function (TanStack Start only)constgetProducts=createServerFnTool({name:'getProducts',inputSchema:z.object({query:z.string()}),execute:async({ query})=>db.products.search(query),})// Use in AI chatchat({tools:[getProducts.server]})// Call directly from components (no API endpoint needed!)constproducts=awaitgetProducts.serverFn({query:'laptop'})

No duplicate logic, full type safety, automatic validation. TheserverFn feature requires TanStack Start. Seedocs for details.

• We welcome issues and pull requests!
• Participate inGitHub discussions
• Chat with the community onDiscord
• SeeCONTRIBUTING.md for setup instructions

We're looking for TanStack AI Partners to join our mission! Partner with us to push the boundaries of TanStack AI and build amazing things together.

LET'S CHAT

• TanStack Config – Tooling for JS/TS packages
• TanStack DB – Reactive sync client store
• TanStack Devtools – Unified devtools panel
• TanStack Form – Type‑safe form state
• TanStack Pacer – Debouncing, throttling, batching
• TanStack Query – Async state & caching
• TanStack Ranger – Range & slider primitives
• TanStack Router – Type‑safe routing, caching & URL state
• TanStack Start – Full‑stack SSR & streaming
• TanStack Store – Reactive data store
• TanStack Table – Headless datagrids
• TanStack Virtual – Virtualized rendering

… and more atTanStack.com »