Open Source SOTA Model
The #1 Open-Source
AI Video Generator
15B-parameter unified Transformer with native joint audio-video synthesis. 1080p in ~38 seconds. 7-language lip-sync. Fully open source.
Technical Advantages
Why Choose Happy Horse 1.0
Performance
Blazing Fast: ~38s for 1080p
DMD-2 distillation reduces denoising to just 8 steps without CFG. MagiCompiler accelerated inference delivers ~2s for 5-second 256p video, ~38s for 1080p on H100.
Audio
Native Joint Audio-Video Synthesis
Single unified 40-layer Transformer generates video and audio together in one pass. Perfectly synchronized dialogue, ambient sounds, and Foley effects.
Multilingual
7-Language Ultra-Low WER Lip-Sync
Native support for English, Mandarin, Cantonese, Japanese, Korean, German, and French with ultra-low Word Error Rate.
Open Source
Fully Open Source & Customizable
Complete open-source release: base model, distilled model, super-resolution module, and inference code. Self-host and fine-tune.
Generation
Text-to-Video & Image-to-Video
Generate stunning videos from text or transform static images into dynamic video with high physical realism and cinematic quality.
Architecture
Unified Transformer Architecture
A single 40-layer self-attention Transformer processes text, image, video, and audio tokens in one unified sequence.
Core Technology
Under the Hood
15B Params / 40 Layers / Unified
Unified Transformer Architecture
Parameters
Sandwich architecture with modality-specific layers at start/end and 32 shared-parameter layers in the middle.
Denoising Steps
DMD-2 distillation eliminates the need for CFG. Timestep-free denoising and MagiCompiler deliver the fastest open-source AI video.
Layers
Self-attention layers process text, image, video, and audio tokens in one unified sequence for true multimodal understanding.
Native Audio-Video Sync
Perfectly Synchronized Audio & Video
A single unified Transformer generates dialogue, ambient sounds, and Foley effects in perfect sync with the visual content. No post-processing required.
Creation Pipeline
Create AI Videos in 4 Steps
From prompt to 1080p video with native audio — in ~38 seconds on H100.
Describe Your Story
Text or Image Prompt
Enter a text prompt describing your scene — characters, mood, dialogue, and audio. Or upload a photo for Image-to-Video with high physical realism.
Choose Resolution & Ratio
Up to 1080p Output
Select output resolution up to 1080p and choose from multiple aspect ratios (16:9, 9:16, 4:3, 21:9, 1:1). Supports 5-8 second video clips with native audio.
Select Audio Language
7 Languages Lip-Sync
Choose your lip-sync language from 7 supported languages: English, Mandarin, Cantonese, Japanese, Korean, German, and French.
Generate in ~38 Seconds
1080p + Synced Audio
The 15B-parameter unified Transformer with DMD-2 distillation generates 1080p video and audio jointly — synchronized dialogue, ambient sounds, and Foley.
Testimonials
Loved by Creators Worldwide
The multi-shot storytelling is a game changer. I created a 3-scene narrative with consistent characters in under 2 minutes.
Alex Chen
Indie Filmmaker
Native audio generation blew my mind. Dialogue, sound effects, and ambient audio — all perfectly synced from one prompt.
Sarah Kim
Content Creator
We replaced our entire motion graphics pipeline with Happy Horse 1.0. The 2K cinema quality is genuinely production-ready.
Marcus Rivera
Studio Director
30% faster than anything else I've tried, and the physics simulation for fluid and cloth is just stunning.
David Park
VFX Artist
From prompt to a complete short film with audio in 60 seconds. This is the future of content creation, no question.
Emma Laurent
YouTube Creator
Character consistency across scenes is something no other tool can do. Faces, clothing, body types — all locked perfectly.
James Wright
Animation Director
Pricing
Simple, Transparent Pricing
Powered by the world's leading open-source SOTA AI video generator.
Basic
540 credits each month, ideal for individual creators getting started.
- 540 credits/month
- 1080p video generation
- Text-to-Video & Image-to-Video
- 7-language native lip-sync
- Email support
Pro
2040 credits and priority processing for professional creators.
- 2,040 credits/month
- Priority processing queue
- All Basic features
- Native audio-video joint generation
- Priority support
Studio
6000 credits, fastest queues, and dedicated account management.
- 6,000 credits/month
- Fastest processing queues
- All Pro features
- Dedicated account manager
- Full commercial rights
FAQ
Frequently Asked Questions
Get Started
Start Creating Today
Join thousands of creators using the world's leading open-source AI video generator. Free credits to get started.