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Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one

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Bun bun-v1.3.1

Bun: bun-v1.3.1 Release

Release date:

October 22, 2025

Previous version:

bun-v1.3.0 (released October 10, 2025)

Magnitude:

1,396 Diff Delta

Contributors:

4 total committers

Data confidence:

Commits:

95 Features Released with bun-v1.3.1

← Previous 1 2 3 4 Next →

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Top Contributors in bun-v1.3.1

Jarred-Sumner

sosukesuzuki

RiskyMH

github-actions[bot]

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Release Notes Published

To install Bun v1.3.1 ```bash curl -fsSL https://bun.sh/install | bash

or you can use npm

npm install -g bun


Windows:
```bash
powershell -c "irm bun.sh/install.ps1|iex"

To upgrade to Bun v1.3.1: bash bun upgrade

Read Bun v1.3.1's release notes on Bun's blog

Thanks to 15 contributors!

Special thanks to Martin Schwarzl of Cloudflare for fuzzing & reporting several bugs!!