HappyHorse

HappyHorse 1.0 — also written HappyHorse-1.0 — is the first major release of the HappyHorse open-source AI video model. It uses a 15-billion-parameter architecture optimized for temporal coherence, smooth motion rendering, and accurate prompt-to-video translation, and it ships with a commercial usage license that covers monetization and client work. The model appeared on the Artificial Analysis video leaderboard in early April 2026 and quickly drew attention for outperforming closed-source models that cost significantly more to access.

HappyHorse-1.0 runs through a browser-based interface — no local GPU, no terminal, no model weight download required.