- Last feature update: Marshmallow: October 5, 2015
- Last security update:
According to Google[1]: Nexus devices get security patches for at least 3 years from when the device first became available, or at least 18 months from when the Google Store last sold the device, whichever is longer.
So, worst case scenario: October 2016 is the last security patch. We might get more, depending on when the Google Store last sold the Nexus 5, but I don't know when that was.