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Anthropic Rewrote Bun in Rust With 64 Claude Agents for $165K. The Real Bill Is Higher

This story is from 2026-08-22. It is preserved in the archive; the latest stories are on the live feed.

In December 2025, Anthropic bought Bun, the JavaScript runtime with over 22 million monthly downloads, and then ported its entire codebase from Zig to Rust. The port was done in 11 days by 64 parallel Claude agents at a reported cost of $165,000 in tokens. Those numbers have traveled far, usually a…

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  1. 2026-08-22 15:01 · DEV Community — AI
    Anthropic Rewrote Bun in Rust With 64 Claude Agents for $165K. The Real Bill Is Higher

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