OnePlus has now confirmed that Cyanogen OS 13, which is based on Android 6.0 Marshmallow, will begin rolling out to the OnePlus One via an over-the-air update imminently. Speaking on OnePlus' forums, a OnePlus representative announced the rollout, stating:.
While CyanogenMod is referenced rather than Cyanogen OS, some users have already begun receiving the OTA update, confirming that it is indeed CyanogenOS 13.
Regardless, OnePlus One owners should begin seeing the update arrive over the coming days. Once updated, you'll have access to all of Android 6.0 Marshmallow's goodies, which include Doze mode, granular app permissions and more.