Anthropic Acquires Bun

Summary

Claude is the world’s smartest and most capable AI model for developers, startups, and enterprises. Claude Code represents a new era of agentic coding, fundamentally changing how teams build software. In November, Claude Code achieved a significant milestone: just six months after becoming available to the public, it reached $1 billion in run-rate revenue. And today we’re announcing that Anthropic is acquiring Bun—a breakthrough JavaScript runtime—to further accelerate Claude Code.Bun is redefining speed and performance for modern software engineering and development. Founded by Jarred Sumner in 2021, Bun is dramatically faster than the leading competition. As an all-in-one toolkit—combining runtime, package manager, bundler, and test runner—it's become essential infrastructure for AI-led software engineering, helping developers build and test applications at unprecedented velocity.Bun has improved the JavaScript and TypeScript developer experience by optimizing for reliability, speed, and delight. For those using Claude Code, this acquisition means faster performance, improved stability, and new capabilities. Together, we’ll keep making Bun the best JavaScript runtime for all developers, while building even better workflows into Claude Code.Since becoming generally available in May 2025, Claude Code has grown from its origins as an internal engineering experiment into a critical tool for many of the world’s category-leading enterprises, including Netflix, Spotify, KPMG, L’Oreal, and Salesforce—and Bun has been key in helping scale its infrastructure throughout that evolution. We’ve been a close partner of Bun for many months. Our collaboration has been central to the rapid execution of the Claude Code team, and it directly drove the recent launch of Claude Code’s native installer. We know the Bun team is building from the same vantage point that we do at Anthropic, with a focus on rethinking the developer experience and building innovative, useful products."Bun rep...