Anthropic announced the purchase of Bun just as Claude Code reached a revenue run-rate of $1B in only six months. Why does that matter? Because it combines an AI model already dominant with developers and a piece of infrastructure that speeds up modern web development.

What happened

Anthropic, the company behind Claude, reported that it is acquiring Bun, the JavaScript runtime created by Jarred Sumner in 2021. The acquisition comes after Claude Code, the Claude version focused on programming and automation, hit a notable milestone: $1B of run-rate revenue six months after becoming publicly available.

Claude Code presents a new era in agent-assisted coding: it’s not just smart autocompletion, but workflows that can execute, test, and deploy code. Combining that with Bun aims to speed those workflows from the technical foundation up.

"Bun represents exactly the kind of engineering excellence we want to integrate into Anthropic," said Mike Krieger, head of product at Anthropic.