v0 is Vercel’s generative UI tool: describe an interface and it produces clean React and Next.js code with Tailwind and shadcn/ui, which you can refine visually in Design Mode, sync to GitHub and deploy to Vercel without leaving the tab. Model choices (Mini, Pro, Max) trade speed against intelligence.
Pricing is credit-based: a free tier with $5 in one-time credits and 7 messages per day, then Plus at $30 per user per month including $30 of monthly credits plus $2 of free daily credits. Teams get centralized billing on vercel.com, and Business adds training opt-outs and admin controls.