Google announced that the new OS is rolling out now and is posting system images for the Pixel 2 and 2 XL, the Pixel 1 and 1 XL, the Pixel C tablet, and the Nexus 6P and 5X. The Android Open Source Project (AOSP) code drop should be happening now, too.
Android 8.1 Oreo is a minor maintenance release after the major update of Android 8.0. The biggest feature in 8.1 is a new “Neural Networks API” (NNAPI), which is designed for running machine learning operations on mobile devices.
Google’s first ever consumer SoC, and it lives alongside the usual eight-core Qualcomm Snapdragon 835. The Pixel Visual Core—which was designed with help from Intel—will power NNAPI functions, and it allows Google’s HDR+ image processing to run “5x faster and at less than 1/10th the energy.” It shipped in a dormant mode when the Pixel 2 was released, but with the release of Android 8.1, Google is turning it on for everyone.