Ember.js End of Life: The LTS Cadence & Every Version EOL Date

Ember.js has ended support for all versions prior to 6.8, with Ember 6.4 reaching end of life on June 21, 2026. The framework's LTS cadence means teams must upgrade regularly to avoid stranded apps, as many remain on the classic 3.28 release which has been EOL since January 2023. The current supported line is Ember 6.8 LTS, supported through December 2026.

Originally published on endoflife.ai. Ember.js moves on a steady release train, designating Long-Term Support LTS releases on a regular cadence — which means older versions reach end of life just as steadily. As of now, Ember 6.x is the current line , with 6.8 and later supported ; Ember 6.4 reached EOL on June 21, 2026 , and every 5.x release and earlier is end of life , including the once-ubiquitous 3.28 LTS. | Version | End of Life | Status | Risk Score | |---|---|---|---| | Ember ≤ 4.x | 2023 – 2024 | EOL | 60 | | Ember 5.4 LTS | Dec 22, 2024 | EOL | 55 | | Ember 5.8 LTS | Jun 15, 2025 | EOL | 50 | | Ember 5.12 LTS | Oct 12, 2025 | EOL | 50 | | Ember 6.4 LTS | Jun 21, 2026 | Just EOL | 35 | | Ember 6.8 LTS | Dec 7, 2026 | Supported | 20 | | Ember 6.11+ latest | Active | Current | 20 | Ember releases on a roughly six-week train and periodically blesses a release as LTS . The LTS releases are what most teams target — they get a longer, fixed support window than the six-week releases. When that window ends, the LTS and everything before it is EOL. A new LTS arrives roughly every couple of quarters, and an older one drops off at a similar rhythm. Like Angular, Ember rewards a standing upgrade habit: stay on the current or immediately-previous LTS and upgrades are small; let several windows pass and the gap compounds. Target the LTS, not the bleeding edge.Pin to the most recent LTS or the one just behind it with an upgrade scheduled , put its EOL date in your roadmap, and move before it lands. The reason so many Ember apps are stranded years back isn't the cadence — it's Octane . Ember Octane default in the 3.x series modernised Ember substantially: Glimmer components, tracked properties, native classes, and a move away from the classic object model. A genuine improvement, but it changed enough idioms that migrating a large classic-Ember app is real work. Many teams paused on a late classic 3.x release — 3.28 being the common resting point — and never jumped. Those apps are now multiple majors and several years past EOL 3.28 has been EOL since January 2023 . Ember 6.8 LTS supported through December 2026 is the conservative target; the latest release 6.11+ carries the newest features and longest runway. Both score 20 Low . Modern Ember is Octane-by-default and considerably leaner than the 3.x-era apps people remember. ember --version + package.json , cross-referenced against the table.Apps pinned to 3.28 or earlier sometimes need a real, scheduled project to reach a supported 6.x — the Octane jump plus the version gap is genuine work. Extended support can keep an EOL Ember app patched in the interim. Full guide, live per-LTS Risk Scores, and the rest of the framework lifecycle data at endoflife.ai. Check your whole stack free with the Stack Scanner.