HappyHorse 1.0: The Mystery Model That Just Topped Every AI Video Leaderboard
No press release. No company name. No announcement. On April 7, 2026, a model called "HappyHorse-1.0" quietly appeared at the top of the Artificial Analysis video leaderboard — and nobody could fully explain where it came from.
Published: April 9, 2026 · Category: AI Video · Read time: 6 min
