Automatic nightly builds of the new firmware Cyanogen Inc. Today they came by night for the most popular smartphones.
CyanogenMod firmware version 12.1, based on Androin 5.1, was supposed to come out later in the finished version. However, the developers decided not to wait and to offer «nightgown» those users who are willing to test the new firmware.
Now CM 12.1 is available for HTC Droid, Google Nexus July 2013 (4G), several models of LG (G, G Pro, One XL), Motorola Moto G, and this list is constantly updated. Reselect «Chinese» One Plus One. This top-end smartphone from China has received the first SM 12, and the new version is not left behind, received one of the first update.
It is worth noting that so far only a ready «nightly build» EEPROM, so before upgrading is mentally prepare yourself for bugs in the operating system.