Vercel AI SDK 6

Vercel AI SDK 6 is a TypeScript toolkit for building production-grade agents and generative UI with a unified API for any LLM provider.

Released in December 2025, AI SDK 6 shifts the focus toward autonomous systems with a first-class Agent abstraction and stable Model Context Protocol (MCP) support. This version introduces the ToolLoopAgent for automated multi-step reasoning and a needsApproval flag to implement human-in-the-loop safety for sensitive tool calls. Developers can now leverage native reranking, image-to-image editing, and a dedicated DevTools interface to inspect token usage and execution flows. With over 20 million monthly downloads and a seamless migration via npx @ai-sdk/codemod v6, it remains the industry standard for integrating models from OpenAI, Anthropic, and Google into Next.js and React applications.

https://sdk.vercel.ai/docs