Move an app to TanStack AI from the Vercel AI SDK or raw provider SDKs, or move it off a deprecated TanStack AI API. Use when someone asks whether to switch AI libraries, when code mixes streamText, generateText, generateObject, createOpenAI, or @ai-sdk/* with TanStack AI, when an upgrade breaks, or when someone hits a renamed option, a deprecated -ui package, or an old adapter shape. Triggers on "migrate", "switch from Vercel AI SDK", "ai-sdk", "streamText", "upgrade TanStack AI", "deprecated", "breaking change", "codemod".
Two different jobs. Pick the one that matches the code in front of you.
The name-by-name mapping lives in the docs, and it is longer than any summary that fits here:
https://tanstack.com/ai/latest/docs/migration/migration-from-vercel-ai
The shape of the change:
streamText and generateText become one chat() call with a streaming
option.createOpenAI(...) becomes a tree-shakeable adapter, such as openaiText()
from @tanstack/ai-openai.onFinish and friends become middleware hooks.generateObject becomes structured outputs on chat().Read the guide, then load the target API's own skill with
npx @tanstack/intent@latest load @tanstack/ai#ai-core. Do not port from memory: a half-remembered mapping produces
code that type-checks in neither SDK.
Start with the version the app has, and the current release:
node -p "require('@tanstack/ai/package.json').version"
npm view @tanstack/ai version
Then read the guides for what changed:
Deprecated APIs keep working, so upgrade in steps rather than rewriting everything at once.
Some renames have a jscodeshift transform. Run it straight from the repo, and
preview first with --dry --print:
npx jscodeshift \
-t https://raw.githubusercontent.com/TanStack/ai/main/codemods/ag-ui-compliance/transform.ts \
--dry --print src/
Each guide names the codemod that covers it, and what the codemod cannot reach. Server-side rewrites are usually manual.
Run the project's type checker. Most errors after a migration come from an API
that was remembered rather than read, so check the failing name against
node_modules/@tanstack/ai/src/ before changing it again.
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