This month's update is based on Android 7.1.2 and Android 7.1.1, depending on the device targeted. In addition to the Pixel and Nexus handsets, the Nexus Player digital media player and the Nexus 9 tablet also got updated.
https://www.notebookcheck.net/Google-s-August-Android-security-patch-now-available-for-Nexus-and-Pixel-devices.240406.0.html