The official Weibo channel for the Master Lu benchmark claims to have seen its first 18GB RAM phone. Somewhat unsurprisingly, it is the ROG Phone 5, which has also surfaced on Geekbench with this ground-breaking spec. On this occasion, it has apparently shot right to the top of the rankings in this test.
https://www.notebookcheck.net/The-18GB-Asus-ROG-Phone-5-may-have-already-smashed-Master-Lu-benchmarking-records-ahead-of-its-launch.526418.0.html