HappyHorse 1.0 is the official open-source AI video generation model from the Happy Horse team — a 15-billion-parameter unified Transformer that jointly produces video and synchronized audio from text or image prompts, with cinematic 1080p quality and seven-language lip-sync.
Explore stunning AI-generated videos created by Happy Horse 1.0. Each video showcases the model's ability to understand prompts and generate high-quality, cinematic content.
by Happy Horse
by Happy Horse
by Happy Horse
by Happy Horse
by Happy Horse
Built on a 15B-parameter unified Transformer for joint video and audio generation
Generate video from text descriptions or animate images with AI. Supports both input types seamlessly.
Jointly generates video and synchronized audio in a single pass for perfectly matched visual and audio content.
One of the largest open-source video generation models with 15 billion parameters for superior quality.
Industry-leading multilingual lip-sync supporting English, Mandarin, Cantonese, Japanese, Korean, German, and French.
Cinematic quality video output at 1080p resolution with smooth animations and realistic details.
Fully open-source with commercial-use rights. Base model, distilled model, super-resolution module, and inference code included.
Experience the power of open-source AI video generation. Generate your first video with HappyHorse.
Describe your video in natural language
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Animate your images with AI
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Access all HappyHorse features for professional AI video creation.
For solo creators.
Annual billing.
Includes
For growing teams.
Annual billing.
Everything in Starter, plus
For larger teams.
Annual billing.
Everything in Standard, plus
See how HappyHorse 1.0 compares to other leading AI video models
| Model | Developer | Params | Inputs | License |
|---|---|---|---|---|
Happy Horse 1.0 | Happy Horse Team | ~15B | Text / Image | Open Source (Commercial) |
| Seedance 2.0 | ByteDance Seed | Undisclosed | Text / Image / Audio / Video | Proprietary |
| OVI 1.1 | Character AI & Yale | ~11B | Text (Image opt.) | Apache 2.0 |
| LTX 2.3 | Lightricks | 22B | Text / Image / Video / Audio | Apache 2.0 |
Understanding HappyHorse 1.0 architecture and capabilities
Happy Horse 1.0 is a 15B-parameter open-source AI video generation model that jointly produces video and synchronized audio from text or image prompts. Built as a unified Transformer architecture, it delivers cinematic 1080p quality with industry-leading multilingual lip-sync capabilities.
HappyHorse uses a novel unified Transformer approach that processes both video and audio generation in a single pass, ensuring perfect synchronization between visual and audio elements. This architecture enables efficient generation while maintaining high quality across all supported languages.
HappyHorse supports seven languages with industry-leading low Word Error Rate: English, Mandarin, Cantonese, Japanese, Korean, German, and French. The model achieves near-perfect lip-sync across all supported languages, making it ideal for global content creation.
Answers to common questions about Happy Horse 1.0
Happy Horse 1.0 is a 15B-parameter open-source AI video generation model that jointly produces video and synchronized audio from text or image prompts.
Yes. Happy Horse is released as open source with commercial-use rights, including the base model, distilled model, super-resolution module, and inference code.
An NVIDIA H100 or A100 GPU with at least 48GB VRAM is recommended. A 5-second 1080p clip generates in roughly 38 seconds on H100.
Seven languages: English, Mandarin, Cantonese, Japanese, Korean, German, and French — with industry-leading low Word Error Rate.
Happy Horse 1.0 outperforms OVI 1.1 (80.0% win rate) and LTX 2.3 (60.9% win rate) across visual quality, prompt alignment, and Word Error Rate.
Join the open-source revolution in AI video generation. Try HappyHorse 1.0 today and experience cinematic quality with synchronized audio and multilingual lip-sync.
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