What it is

A TypeScript toolkit that gives every model provider one interface — generateText, streamText, structured object generation, tool calling — plus React, Svelte and Vue hooks for streaming UI. It supports 100+ models across 20+ providers; a Python version is in beta.

Why it earns a slot

Swapping providers is a one-line change, and streaming chat UI that would take a day of SSE plumbing takes about ten lines. It is the default choice for anything Next.js shaped.

Know before you commit

Major versions have shipped breaking API changes, so older tutorials and AI-generated snippets often will not compile — check which version an example targets before copying it.

Getting started

npm i ai

Field notes

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Pricing snapshot

Free and open source. No cost beyond the model provider you call; Vercel AI Gateway usage is billed separately if you opt into it.

Snapshots move fast — verify at checkout, and post a field note if it changed.

Drop into your Lovable chat

Evaluate Vercel AI SDK (https://ai-sdk.dev) for this project, then use it only if it fits what we are already building.
Context: TypeScript AI app framework. A TypeScript toolkit that gives every model provider one interface — generateText, streamText, structured object generation, tool calling — plus React, Svelte and Vue hooks for streaming UI. It supports 100+ models across 20+ providers; a Python version is in beta.
Reviewer notes (general, not written for this codebase): Swapping providers is a one-line change, and streaming chat UI that would take a day of SSE plumbing takes about ten lines. It is the default choice for anything Next.js shaped.
Watch out for: Major versions have shipped breaking API changes, so older tutorials and AI-generated snippets often will not compile — check which version an example targets before copying it.
Pricing: Free and open source. No cost beyond the model provider you call; Vercel AI Gateway usage is billed separately if you opt into it.
Setup: npm i ai
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

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