13.1.0 is an OLPC OS release focused on adding support for the XO-4 laptop and adding touch support to Sugar. The supported platforms are XO-1, XO-1.5 (including XO-1.5 High School Edition), XO-1.75 and XO-4.
The release plan can be found at /Release plan.
Released on: 2013-05-06
Release notes: Release notes/13.1.0
 Download and installation
Download and installation instructions can now be found in the release notes.
The release is built with OS Builder version 6.0.x under Fedora 18.