Mystery dark horse that stormed the Video Arena is now fully open-source and live — generate 1080p video with native audio & lip-sync instantly at happy-horse.art
LOS ANGELES, CA, April 10, 2026 /24-7PressRelease/ — Just 48 hours ago, an unknown model called Happy Horse 1.0 quietly took the #1 spot on Artificial Analysis’ Video Arena. Today, it is fully open-source and live for everyone.
On the latest snapshot of the Artificial Analysis Video Arena (the industry’s most trusted blind user-voting leaderboard), HappyHorse-1.0 now ranks #1 in both Text-to-Video (No Audio) and Image-to-Video (No Audio), beating Seedance 2.0, Kling 3.0, and Sora 2 Pro in head-to-head blind comparisons.
According to public rankings, HappyHorse-1.0 holds Elo ~1383 on text-to-video (no audio) and an even stronger lead on image-to-video. On the with-audio track it sits at a close #2. All results are based on thousands of real user blind votes.
What makes HappyHorse-1.0 different?
15B-parameter unified 40-layer self-attention Transformer with “sandwich” design
Native joint audio-video synthesis in a single forward pass
7-language ultra-low WER lip-sync (English, Mandarin, Cantonese, Japanese, Korean, German, French)
DMD-2 distillation → only 8 denoising steps (no CFG needed)
Blazing fast inference: ~38 seconds for 1080p on a single H100
Try it right now — completely free to start
The full model is live at https://happy-horse.art/generator
No credit card required for trial credits. Supports Text-to-Video, Image-to-Video, native audio, and multiple aspect ratios.
The complete open-source package (weights + inference code + commercial usage rights) is available on the official site. Developers can self-host on a single H100.
The Post-Sora Era just got faster.
While everyone was debating who built the mystery model, Happy Horse 1.0 has already delivered: the #1 ranked open-source video generator is here, it works today, and anyone can use it.
Model information and live official: https://happy-horse.art/
Full leaderboard: Artificial Analysis Video Arena
Happy Horse AI is an independent open-source AI video platform dedicated to making the world’s best video generation models instantly accessible. We provide live web demo, API access, and full open-source weights with commercial rights. No affiliation with any closed-source labs.
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