Bun 1.4 shipped on August 20, 2026, making the Rust rewrite available in a stable release.

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Location PART 3 - THE THIRD AXIS CHAPTER 15: DEPLOY NOW, PRAY LATER Zig & Godot

"Bun 1.4 shipped on August 20, 2026, making the Rust rewrite available in a stable release."

Bun's official August 20 release announcement confirms that version 1.4 shipped the Rust implementation. The release establishes the subsequent outcome of the migration following the public debates over its engineering process and delayed schedule.

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Source title Bun 1.4

Source authors Jarred Sumner, Ciro, Dylan, Alistair and Sosuke

Source year 2026

Confidence high

Importance mid