Anthropic has acquired Bun, the high-performance JavaScript runtime, which they previously adopted for their AI coding assistant, Claude Code. This acquisition follows Claude Code's impressive achievement of $1 billion in run-rate revenue within six months of public availability. Bun's founder, Jarred Sumner, explained that joining Anthropic allows Bun to bypass the challenges of monetization as a VC-backed startup and instead focus on developing the best JavaScript tooling, specifically for AI-driven software like Claude Code and future AI coding products. The move solidifies Bun's role as critical infrastructure for Anthropic's growing AI ecosystem and ensures its continued development without immediate revenue pressure.

