HappyHorse

HappyHorse-1.0 is a video generation model from Alibaba’s ATH AI Innovation Unit that debuted anonymously on the Artificial Analysis benchmark arena on April 7, 2026. It immediately ranked #1 in both text-to-video (Elo 1,333) and image-to-video (Elo 1,392), surpassing Seedance 2.0 Pro. Alibaba revealed its ownership on April 10. The model is in beta with open-source weights listed as “coming soon.” See the AI Video Stack for full details.