AI SDK
TypeScript toolkit for building AI apps and agents.
Vercel · open source · checked Oct 22, 2026
What it is
The AI SDK is Vercel's open-source TypeScript framework for building agents and AI features with a unified API across model providers, streaming UI helpers and tool calling.
Use cases
- →Adding AI chat/agents to a Next.js app
- →Provider-agnostic TypeScript code
- →Streaming UIs
Pros
- +Unified provider API
- +First-class React/Next support
- +Huge adoption
Cons
- −TypeScript only
- −Higher-level orchestration left to you
Where it ranks
- #2 Best Agent Frameworks & Automation Tools
The default TypeScript toolkit for AI features in web apps; free and provider-agnostic.
FAQ
How much does AI SDK cost?
Free and open source (Apache-2.0); you pay your model provider. (As checked on 2026-10-22; confirm on https://ai-sdk.dev/.)
What is AI SDK best for?
#2 in Best Agent Frameworks & Automation Tools: Adding AI to a Next.js/TS app.
What are the best alternatives to AI SDK?
Mastra (TypeScript framework for agents, workflows and RAG); LangChain / LangGraph + LangSmith (Agent frameworks plus LangSmith observability and deployment).
Is AI SDK open source?
Yes, AI SDK is open source (or has an open-source core).