Introduction

What is Happy Horse 1.0?

Happy Horse 1.0 is a 15-billion-parameter open-source AI video generation model built on a unified Transformer architecture. It jointly generates cinematic 1080p video and synchronized audio — including dialogue, ambient sound, and Foley effects — from text or image prompts in a single forward pass.

Key Capabilities

• Text-to-Video: Generate cinematic video scenes from natural language prompts with precise control over composition, motion, and subject consistency.
• Image-to-Video: Animate still images into dynamic video while preserving the original composition, subject identity, and visual style.
• Joint Audio-Video Generation: Produce synchronized dialogue, ambient sound, and Foley effects alongside video in one pass — no separate audio pipeline needed.
• Multilingual Lip-Sync: Native lip-sync support for 6 languages: English, Chinese (Mandarin & Cantonese), Japanese, Korean, German, and French.

Architecture

Happy Horse 1.0 uses a 40-layer self-attention Transformer with 4 modality-specific layers on each end and 32 shared middle layers. All modalities — video, audio, and text — flow through a single unified token sequence, eliminating cross-attention overhead and enabling joint generation.

The model uses an 8-step distilled inference pipeline with no classifier-free guidance required, delivering significantly faster generation times compared to traditional diffusion models.

Getting Started

1. Visit the homepage and try the browser-based video generator — no GPU or local setup required.
2. Choose a model (Happy Horse 1.0 or Seedream 2.0) and input mode (text-to-video or image-to-video).
3. Enter your prompt and click Generate to create your first video.

Credits System

Video generation consumes credits:

Purchase credit packs or subscribe to a monthly plan on the Pricing page.

Support

For questions or feedback, contact us at support@ai-happy-horse.io.