On April 8, a pony suddenly appeared on the Artificial Analysis Video Arena leaderboard.

An anonymous model called HappyHorse scored Elo 1333 for text-to-video and 1391 for image-to-video, breaking records in both categories and knocking ByteDance's SEEDANCE 2.0 off the top spot. SEEDANCE 2.0 had just been released in March of this year, ranking...