We’ve temporarily disabled regular Preview and Stable builds of Slicer (and associated extensions) while we prepare the Slicer 5.12 Stable release. The Slicer repository will be tagged, and the release process will start shortly afterward. You can track progress in the pinned release issue: Relea…

Preview builds are now re-enabled. We are continuing to work on the Slicer 5.12 stable release

Slicer 5.12 is now available! In the coming days the community will be putting together a release announcement. [image] Download 3D Slicer 3D Slicer is a free, open source software for visualization, processing, segmentation, registration, and analysis of medical, biomedical, and other…

That should resolve later today or tomorrow. The Preview will be renumbered to 5.13.0. 5.12 will be the last Qt5 based Slicer, and 5.13 will become the active refactoring (expect some breaking changes in the API) for a Slicer 6.0 release based on Qt6.

The Previews are odd-numbered, the stables are even numbered.

There also seems to be an issue with the download site updating to 5.13, working on this

Release of Slicer 5.12 in progress

Development

lukas-folle (Lukas Folle) June 25, 2026, 11:28am 4

So Slicer 5.11 stable release is skipped?
This does look a bit confusing to me:

2026.06.30 Weekly Meeting

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Release of Slicer 5.12 in progress

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