Key Takeaway
The HappyHorse-1.0 API is scheduled for public release on April 30, 2026. The model is fully open-source with no commercial restrictions. The GitHub repository and model weights are already available.
What We Know So Far
On April 10, 2026, Alibaba's ATH division officially acknowledged HappyHorse-1.0 as an internal R&D project from its AI Innovation Unit. According to reporting by Atlas Cloud (April 13, 2026), the model is currently in private beta, with the public API scheduled for release on April 30.
HappyHorse-1.0 is described as the first open-source video model capable of natively generating audio and video simultaneously in a single inference pass. The GitHub repository is live, model weights are completely open, and there are no commercial usage restrictions under the current license.
Hardware Requirements
The model has approximately 15 billion parameters. According to Atlas Cloud's technical analysis, generating a 5-second 1080p video takes about 38 seconds on a single NVIDIA H100 GPU.
For consumer hardware like the RTX 4090 (24GB VRAM), quantization or offloading will likely be required. Some early testers have reported success with running the model on consumer-grade hardware, but performance is significantly degraded.
What to Expect from the API
The API is expected to offer both text-to-video and image-to-video generation. Key features will likely include:
- Resolution control: Up to 1080p
- Aspect ratio: Support for various aspect ratios
- Seed control: For reproducible results
- Negative prompts: To exclude unwanted elements
How to Prepare
- Review the GitHub repository: Familiarize yourself with the model architecture and code.
- Set up your environment: Ensure you have the necessary hardware and software dependencies installed.
- Join the community: Follow the project on GitHub and join the Discord server for updates and support.
Sources
- Atlas Cloud — "HappyHorse API Launching April 30" (April 13, 2026)
- GitHub — happy-horse/happyhorse-1.0 repository
- CNBC — "Alibaba reveals it's behind viral AI video model" (April 10, 2026)