That is what the AI-assisted Zig to Rust rewrite of Bun reportedly cost at API pricing.
And the interesting part is not just the number.
The rewrite was not "vibe coding".
It was a carefully structured workflow with guides, multiple implementation agents, adversarial reviewer agents, CI loops, fuzzing and manual review.
In other words: AI as leverage, not autopilot.
But it also shows something else:
Bun is not just a small tool with a fast benchmark result.
It is a serious JavaScript and TypeScript runtime with a huge surface area, real compatibility requirements and a growing ecosystem.
So if you've heard "Bun is fast" but still wondered what that means for your projects, our new course is for you.
