Claude Agent SDK vs Vercel AI SDK

Pick two tools from the same category to compare side-by-side.

	Claude Agent SDK Anthropic's official SDK for building production agents on Claude.	Vercel AI SDK Free, open-source TypeScript toolkit from Vercel for building AI-powered apps and agents.
Category	framework	framework
Vendor type	commercial	open source
Pricing	free	free
Strengths	+ First-class Claude features (prompt caching, extended thinking) + Designed around production agent patterns + Compatible with the Skills standard	+ Unified, provider-agnostic API across many model vendors + First-class streaming and UI integration for web frameworks + Strong TypeScript ergonomics and type safety + Free and open source with a large, active community
Tradeoffs	− Claude-only (cross-provider needs a gateway like Portkey)	− TypeScript/JavaScript only, with no Python support − Lighter-weight than full agent-orchestration frameworks for complex flows
Used in stacks	9	0