A Twitter-based leak has posted an image suggesting that a heretofore-unknown device has achieved a score of 395,721 on Antutu Benchmark. Based on this stellar result, and on the model number of the apparent device in question, the leaker asserts that it is the Sony Xperia XZ4 running on the latest Snapdragon 855 processor. This image has also recently made it onto SlashLeaks.
https://www.notebookcheck.net/New-device-with-395-000-Antutu-score-is-alleged-to-be-the-Sony-Xperia-XZ4.390691.0.html
I know what it is. It is a LN2 cooled and highly overclocked Xperia xz4