While the latest smartphones on the SoC Snapdragon 865 can record 8K video, current Google smartphones still cannot record 4K at 60 fps. At one time, the search giant explained this by deciding to perfect the recording mode in Full HD instead of paying attention to the mode that creates the video is very large.
However, it seems that Google is still working to add 4K / 60fps mode to Pixel smartphones. An indication of this was revealed by the unreleased version of the Google Camera 7.4 application. The truth, when such a function appears in Google smartphones, is still unclear. It is possible that she will make her debut in the next generation of Pixel.