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$1,100 and One Week: The Experiment That Broke Build-vs-Buy
What Cloudflare’s AI-rebuilt Next.js reveals about the collapse of integration cost — and when cloning actually makes sense
Cloudflare rebuilt Next.js in one week.
Not a subset.
Not a prototype.
A Vite-powered, production-grade runtime compatible with one of the most complex frontend frameworks in existence. They called it Vinext.
It cost $1,100 in AI tokens. And it’s already running on a .gov domain.
By the end of this piece, you’ll have a 4-condition checklist for deciding when AI-cloning an open-source tool is worth it — and a clear map of where this approach will cost you more than building from scratch.
Because build-vs-buy just became a three-option decision. And the third option has a very narrow sweet spot.
What Cloudflare Actually Did
The motivation was straightforward.
Next.js is optimized for Vercel’s infrastructure.
If you want to run it anywhere else — Cloudflare’s edge, AWS Lambda, your own servers — you’re…
