The latest stable SteamOS version is 3.9.5, released by Valve for all users on 23 October 2026. Valve posts the notes for each version in its Steam announcements, and you’ll find a summary below.
Current version: 3.9.5
Released: 23 October 2026
Release notes: Valve’s announcements on SteamWe update this page with every new version.
What SteamOS 3.9 changed
Valve announced it with “SteamOS 3.9.5 has just been released for all users”, and the notes cover every change since the last stable 3.8 release. For Steam Deck owners, these are the ones that matter most:
- Lower idle power consumption when no audio is playing.
- An updated Arch Linux base.
- Desktop Mode moved from Plasma 6.4.3 to Plasma 6.7.3.
- Hidden Wi-Fi networks now connect on the first attempt.
- The “Disable Frame Limiter” toggle works with VRR enabled.
- Accidentally dragging a launcher window around in Game Mode no longer loses your input.
- Frame limits no longer drop FPS below the intended value on certain external displays.
- Fixed audio issues when hotplugging monitors.
The 3.9 line isn’t only about Steam Deck: Valve’s notes also include fixes for Steam Machine, Steam Frame and Legion Go 2. You can read the full announcement in the Steam Deck news on Steam.
SteamOS vs. Steam client updates
Valve ships two kinds of updates, and they’re easy to mix up in the news feed. SteamOS updates change the Deck’s operating system and carry a version number like 3.9.5. Separately, there are updates to the Steam client itself, named by date (for example “Steam Client Update: October 21st”), with their own channels. They don’t change the SteamOS version, so if you want to know which system version you’re on, only look at updates titled SteamOS.
Update channels: Stable, Beta and Preview
SteamOS has three update channels. You switch between them in Settings > System > System Update Channel.
- Stable is the stable channel. It gets the versions Valve releases “for all users”, currently 3.9.5.
- Beta gets new features that are still being tested.
- Preview carries early builds of the next version. Valve warns they may contain unexpected bugs or stability issues.
Before its release to everyone, the 3.9 series was tested in beta (SteamOS 3.9.2 Beta to 3.9.5 Beta, 25 September to 23 October 2026), and version 3.9.5 reached the stable channel on 23 October 2026. If you mostly want a Deck that just works for gaming, stay on Stable. Beta and Preview only make sense if you want new features early and don’t mind the odd bug.
How to update your Steam Deck
Press the Steam button and open Settings > System > Software Updates. That’s where you check for and install available updates. Afterwards, restart the Deck, either from the Software Updates section or via Steam > Power > Restart.
If you’re tuning performance or battery life after an update, see our performance settings guide. Whether a specific game will run on the Deck is what Steam Deck Verified ratings are for.
SteamOS stable version history
We only list versions released to everyone on the stable channel, not betas or Previews. Newest first.
| Version | Released | What it changed |
|---|---|---|
| 3.9.5 | 23 October 2026 | Updated Arch Linux base, Plasma 6.7.3, lower idle power draw, VRR, Wi-Fi and frame limit fixes. |
| 3.8.28 | 25 September 2026 | New major Mesa driver release with faster ray tracing, better VRAM management, more accurate battery indication, black screen fix in some launchers. |
In 3.8.28, the black screen fix covered launchers including Zenless Zone Zero and FINAL FANTASY XIV Online. The improved battery indication helps when the Deck draws more power than the charger can supply.
What to do if an update fails or the new version misbehaves
If problems show up after an update, you can roll back to the previous SteamOS version and keep your data. That’s the “Previous B” option in the SteamOS menu, which you bring up while the Deck starts. The full process and other fixes are in our Steam Deck troubleshooting guide and in Valve’s official SteamOS Recovery and Troubleshooting article.
Join our Discord and ask other players how SteamOS 3.9 runs on their Deck or whether the beta was worth it: GamersTogether Discord.
SteamOS also runs on Steam Machine, Valve’s gaming PC for the TV. Setup and troubleshooting are covered in our Steam Machine guides.
FAQ
The latest is 3.9.5, which Valve released on 23 October 2026. The official release notes are on Valve’s Steam announcements, and you can find every version in the history table above.
Stable gets the versions Valve releases for everyone. Beta contains features that are still being tested, and Preview carries early builds that may have unexpected bugs. You change the channel in Settings > System > System Update Channel.
We’d recommend it. Only versions that Valve releases for everyone go to the Stable channel. You check for and install updates under Settings > System > Software Updates.
Valve doesn’t announce stable release dates in advance. We’ll add the new version here as soon as Valve releases it for everyone.
Yes, with the Previous B option in the SteamOS menu at startup. Your data stays. The steps are in our Steam Deck troubleshooting guide.
Information verified on 10 November 2026. More guides are in our Steam Deck section, and every platform is covered on our console system updates overview.