Google today made Android 8.1 Oreo official. Google had made the final developer preview of the refreshed platform available at the end of November. Most prominently, Android 8.1 unlocks the Pixel Visual Core on the Pixel 2 and Pixel 2 XL smartphones. This lets app developers put the Pixel phones' HDR+ mode to use in their own imaging apps. Android 8.1 Oreo also includes a significant number of under-the-hood changes. For example, apps can take advantage of hardware acceleration for on-device machine learning operations. Android 8.1 makes changes to notifications, helps developers target low-RAM devices, and improves Oreo's autofill behaviors. Developers gain new tools, too, such as the Safe Browsing API for detecting threats, the Shared Memory API for creating apps that are able to share memory resources, and the Wallpapercolors API for tweaking wallpapers. Android 8.1 Oreo is available to the Pixel, Pixel XL, Pixel 2, Pixel 2 XL, Nexus 5X, Nexus 6P, Nexus Player, and Pixel C. The update will be available over the air in the days ahead.