Vercel AI SDK

The AI SDK from Vercel gives TypeScript developers one interface for building LLM-powered products across providers and frameworks. Its core API handles text generation, streaming, structured output with schema validation, tool calling, and multi-step agent loops, while a swappable provider layer covers OpenAI, Anthropic, Google, and many other model vendors, so switching models is a one-line change rather than a rewrite. On the front end, companion packages supply hooks and components for chat interfaces and generative UI in React, Next.js, Vue, Svelte, and Angular, with streaming responses wired in by default; server-side use runs on Node.js 22 or newer. The SDK also connects to Vercel's AI Gateway for model routing, though it works independently of Vercel hosting. Open source and maintained by the team behind Next.js, it has become a default choice for web developers shipping chatbots, copilots, and agentic features who want provider flexibility without hand-rolling streaming and state management.