TanStack AI is a TypeScript SDK for streaming chat, tool calls, agents, and multimodal apps, with provider adapters and framework bindings. It supports OpenAI, Anthropic, Gemini, and more, and includes multiple UI/framework packages.
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What it is
Type-safe, provider-agnostic TypeScript SDK for building streaming chat, tool-calling agents, structured outputs, realtime voice, media generation, and framework-native AI apps.
How it works
The SDK is built from composable activities and provider adapters. It supports provider adapters (e.g., OpenAI, Anthropic, Gemini) and framework bindings (React, Solid, Vue, Svelte, Preact). It enables streaming chat, tools with a shared toolDefinition contract, structured outputs via schemas, and multimodal workflows through a shared generation client pattern. The adapter system is tree-shakeable by activity.
Getting started
Install:
pnpm add @tanstack/ai @tanstack/ai-openai
For a React chat UI:
pnpm add @tanstack/ai @tanstack/ai-client @tanstack/ai-react @tanstack/ai-openai
OpenRouter option:
pnpm add @tanstack/ai @tanstack/ai-openrouter
Streaming Chat example:
import { chat, toServerSentEventsResponse } from '@tanstack/ai'
import { openaiText } from '@tanstack/ai-openai'
export async function POST(request: Request) {
const body = await request.json()
const stream = chat({
adapter: openaiText('gpt-5.2'),
messages: body.messages,
})
return toServerSentEventsResponse(stream)
}
Tools example:
import { toolDefinition } from '@tanstack/ai'
import { z } from 'zod'
const getProducts = toolDefinition({
name: 'getProducts',
description: 'Search the product catalog',
inputSchema: z.object({ query: z.string() }),
outputSchema: z.array(
z.object({
id: z.string(),
name: z.string(),
}),
),
}).server(async ({ query }) => {
return db.products.search(query)
})
Recent releases
Latest releases (2026-08-04) include updates to:
- @tanstack/solid-ai-devtools@0.2.68 with dependency @tanstack/ai-devtools-core@0.5.0
- @tanstack/react-ai-devtools@0.2.68 with dependency @tanstack/ai-devtools-core@0.5.0
- @tanstack/preact-ai-devtools@0.1.68 with dependency @tanstack/ai-devtools-core@0.5.0
- @tanstack/ai-vue-ui@0.2.35 with dependency @tanstack/ai-vue@0.16.0
- @tanstack/ai-solid-ui@0.7.15 with dependencies @tanstack/ai-client@0.23.0 and @tanstack/ai-soli
Traction
stars_7d present: 2957 stars_1d present: 2957
Behind the repo
Organization: TanStack
Caveats
License: MIT Created: 2025-10-08 Last push: 2026-08-04 Open issues: 118 Language: TypeScript