---
scope: org
organization: bun
release_count: 4
last_release: 2026-10-10
generated: 2026-04-28
updated: 2026-10-13
canonical: https://releases.sh/bun/overview.md
---

Shipped Bun v1.4 in August, followed by three patch releases through v1.4.3 in October.

**Bun v1.4 opened the current series.** The major release landed with its own blog post and a fresh install path at `bun.com/install`; `bun upgrade` remains the in-place upgrade. Follow-ups came fast — v1.4.1 and v1.4.2 within a day and a month, then v1.4.3 in early October.

**The v1.3.x line closed out with real shipping.** Carried forward from that series:
- Test isolation and CI tooling: `--isolate`, `--parallel`, `--shard`, and `--changed`
- Cheaper installs: streaming tarball extraction cut memory 17x, and the isolated linker took peer-heavy monorepos from 20.5s to 2.4s
- New native APIs: `Bun.WebView`, `Bun.cron()`, and Markdown-to-ANSI rendering via `bun ./file.md`
- A REPL rewritten in Zig, Windows ARM64 support, and self-contained HTML bundles through `--compile --target=browser`

Source maps moved to a bit-packed binary format using 8x less memory, and gzip got 5.5x faster. A request smuggling fix and an HTTP response splitting patch landed across the series.