Anthropic brings Bun in-house, the runtime powering Claude Codeβs $1B ARR
3 December 2025 at 15:50
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Anthropic has acquired Bun, the popular JavaScript and TypeScript runtime and toolchain. The company says the deal strengthens the infrastructure behind both its coding tool Claude Code and the Claude Agent SDK. Bun already powers these systems today, and Claude Code ships to millions of users as a Bun executable.
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