http://www.techradar.com/news/see-googles-first-custom-chip-in-ifixits-pixel-2-xl-teardown

Google only announced that it had secretly stuffed new, custom "Pixel Visual Core" chips into its new Pixel 2 XL phones earlier this week, perhaps in expectation that someone like teardown iFixit was going to rip open the devices and find them anyway. 

And, sure enough, iFixit's recently released teardown for the Google Pixel 2 XL reveals the powerful imaging-focused chip humbly packed in beside the familiar Snapdragon 835 processor.