AI, obviously. At 18-19x zoom it’s nothing but a bright spot, a just one notch later it’s super-clear Moon, with more clarity than what you get with a DSLR, even through fog and/or clouds. And if you take your binoculars or something similar you will see that the Moon is not really that easy to spot that clearly with that much detail.
Edit: iPhone 16 Pro, and it still fails in comparison with the (3a), pretty obviously why:
