9 July 2026

Bun creator says he rewrote Bun from Zig to Rust using a pre-release version of Claude Fable 5 in 11 days; the task would've taken three engineers about a year (Jarred Sumner/bun.com)

Jarred Sumner / bun.com:
Bun creator says he rewrote Bun from Zig to Rust using a pre-release version of Claude Fable 5 in 11 days; the task would've taken three engineers about a year  —  Disclosure: Bun was acquired by Anthropic in December 2025.  I and others on the Bun team work at Anthropic.

Posted from: this blog via Microsoft Power Automate.

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