Key Features of HappyHorse 1.0
Generate Video & Audio in One Pass
Generate synchronized 5–8 second videos with dialogue, ambient sounds, and Foley effects directly from text prompts. HappyHorse 1.0's unified 15B Transformer produces video and audio jointly in a single forward pass — no post-production audio stitching needed.
Generate Video & Audio in One Pass
Generate synchronized 5–8 second videos with dialogue, ambient sounds, and Foley effects directly from text prompts. HappyHorse 1.0's unified 15B Transformer produces video and audio jointly in a single forward pass — no post-production audio stitching needed.
Animate Any Image with Physics-Accurate Motion
Transform uploaded images into dynamic video with enhanced facial preservation and physics-accurate movement. Smooth keyframe transitions maintain consistent visual quality — from product shots to portraits, the subject stays locked while the world comes alive.
Animate Any Image with Physics-Accurate Motion
Transform uploaded images into dynamic video with enhanced facial preservation and physics-accurate movement. Smooth keyframe transitions maintain consistent visual quality — from product shots to portraits, the subject stays locked while the world comes alive.
Phoneme-Level Precision Across Languages
Industry-leading Word Error Rate (WER) for lip synchronization in English, Mandarin, Cantonese, Japanese, Korean, German, and French. Characters speak naturally with precise mouth movements matched to every phoneme.
Phoneme-Level Precision Across Languages
Industry-leading Word Error Rate (WER) for lip synchronization in English, Mandarin, Cantonese, Japanese, Korean, German, and French. Characters speak naturally with precise mouth movements matched to every phoneme.
1080p in ~38 Seconds, 256p in ~2 Seconds
DMD-2 distillation reduces inference to just 8 denoising steps without classifier-free guidance. MagiCompiler acceleration delivers 256p preview in ~2 seconds and full 1080p output in ~38 seconds on a single H100 GPU.
1080p in ~38 Seconds, 256p in ~2 Seconds
DMD-2 distillation reduces inference to just 8 denoising steps without classifier-free guidance. MagiCompiler acceleration delivers 256p preview in ~2 seconds and full 1080p output in ~38 seconds on a single H100 GPU.
Self-Host, Fine-Tune, Ship to Production
Base model, distilled model, super-resolution module, and inference code are 100% open-source. Full commercial licensing lets developers and enterprises self-host, customize, and fine-tune for any use case — with zero vendor lock-in.
Self-Host, Fine-Tune, Ship to Production
Base model, distilled model, super-resolution module, and inference code are 100% open-source. Full commercial licensing lets developers and enterprises self-host, customize, and fine-tune for any use case — with zero vendor lock-in.
Architecture & Technology
What powers the #1 open-source AI video model
Sandwich Architecture
Modality-specific input/output layers wrap 32 shared-parameter middle layers, processing text, image, video, and audio tokens in one sequence without multi-stream complexity.
DMD-2 Distillation
Distribution Matching Distillation enables 8-step inference without classifier-free guidance (CFG), dramatically reducing generation time while maintaining output quality.
Joint Audio-Video Forward Pass
Audio and video are generated simultaneously in a single forward pass — not stitched together post-production — ensuring perfect temporal alignment between sound and motion.
100% Open-Source Stack
Base model, distilled model, super-resolution module, and inference code are all publicly available. Full commercial licensing enables self-hosting and custom fine-tuning.
Getting Started
How to Use HappyHorse 1.0
Choose Your Input Mode
Select text-to-video to generate from a text prompt, or image-to-video to animate an uploaded image with physics-accurate motion synthesis.
Write Your Prompt & Configure
Describe your scene in natural language. HappyHorse 1.0 generates 5–8 second clips at up to 1080p resolution with native audio included.
Generate & Export
Click Generate to create your video with synchronized audio in a single forward pass. Export commercially licensed footage ready for production use.
FAQ About HappyHorse 1.0
We've answered the most frequently asked questions
HappyHorse 1.0 is the #1 ranked open-source AI video model, featuring a 15B-parameter unified Transformer with 8-step inference. It generates video and audio jointly in a single forward pass, supports 7-language lip-sync, and is fully open-source with commercial licensing.
HappyHorse 1.0 generates 256p video in approximately 2 seconds and 1080p video in approximately 38 seconds on a single H100 GPU, thanks to DMD-2 distillation enabling 8-step inference without classifier-free guidance.
Yes. HappyHorse 1.0 is 100% open-source — including the base model, distilled model, super-resolution module, and inference code. Full commercial licensing is supported for self-hosting and custom fine-tuning.
HappyHorse 1.0 topped the Artificial Analysis Video Arena leaderboard, surpassing Seedance 2.0 in both text-to-video (1333–1357 Elo vs Seedance 2.0) and image-to-video (1391–1406 Elo). HappyHorse is also fully open-source with self-hosting support.
7 languages with phoneme-level accuracy: English, Mandarin, Cantonese, Japanese, Korean, German, and French — with industry-leading Word Error Rate (WER) for lip-sync precision.
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Open-Source #1. Production-Ready.
HappyHorse 1.0 tops the global leaderboard with 15B parameters, 8-step inference, native audio-video generation, and 7-language lip-sync — fully open-source and commercially licensed.
Join the waitlist to get early access when HappyHorse 1.0 launches on LumiYing.