A slew of Sony devices are the next dominos to fall down in the Android 6.0 Marshmallow chain. The entire Xperia X5 lineup of phones started receiving the Marshmallow update internationally today.
The Z5 family is not the only Sony products to get the update. The Xperia Z3+ and the Xperia Z4 Tablet are also starting to receive the download of the latest Android update. The same build number should be the same across all devices: 32.1.A.1.163.
It looks like a number of various Sony mobile product owners have something to rejoice about today.
Source: Xperia Blog 1, 2]