The GE90 was already a great success and powered ... Book of World Records as the the most powerful commercial aircraft jet engine (test performance) after reaching 134,300 lbs of thrust.” ...

The GE9X isn't even the longest engine as it's 220 inches while the GE90 is 287 inches. So the GE9X might not be the largest commercial jet engine, or even larger than the GE90, but it is likely ...