Google has always made it clear that it would be providing OS updates to its Nexus and Pixel devices for two years since their launch and security updates for three years. Today, Google is explicitly making it clear as to how long it will be supporting its existing Pixel and Nexus devices.
The Nexus 6P and Nexus 5X, the company’s last Nexus handsets, are not guaranteed to receive any Android version updates after September 2017, while they will not get any security updates after September 2018. By September 2017, the Nexus 6P and 5X will be two years old so this is in line with Google’s previous timeframe.
As for the Pixel and Pixel XL, they are slated to get guaranteed software updates until October 2018, with security patches confirmed until October 2019.
While Google also lists all other previous Nexus devices, they have all reached their end of life in terms of Android updates, with only the Nexus 9 and Nexus 6 slated to receive security patch updates until October 2017 this year.
Again, none of the information above is new. Google had made them public a long time ago, it’s just that the company is now providing the exact month as to when its devices will stop receiving Android and security patch updates.[Via Google, Droid-Life]