# Bun ditches Zig for Rust with help from Claude Fable 5, writes over a million lines of code in 11 days

> Bun ditches Zig for Rust with help from Claude Fable 5, writes over a million lines of code in 11 days The JavaScript tool Bun has been fully rewritten from Zig to Rust, and Anthropic's Fable 5 did most of the work.

- **Source:** [The-decoder](https://the-decoder.com/bun-ditches-zig-for-rust-with-help-from-claude-fable-5-writes-over-a-million-lines-of-code-in-11-days/?utm_source=gearopen.com&utm_medium=referral&utm_campaign=feed&utm_content=6a50e55affca446919840e28)
- **Published:** 2026-07-10
- **Category:** AI & Bots
- **Tags:** #nintendo-switch #claude #anthropic #ai
- **Canonical:** http://localhost:4321/a/6a50e55affca446919840e28

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_GearOpen's distilled summary. The full original article is published at The-decoder (source link above); GearOpen does not republish the source's full text._