Sora Shutdown Notice: OpenAI announced retirement of Sora app (Apr 26, 2026) and API (Sept 2026).
Sora is shutting down.
Happy Horse 1.0 is here.
The retirement of Sora signals a major shift in the AI video landscape. Proprietary models are proving difficult to scale, but the open-source community is just getting started. Happy Horse 1.0 offers a permanent, reliable, and powerful alternative for those left stranded by OpenAI's departure.
Permanent Ownership
No reliance on external APIs that can be shut down. You own the model.
Sustainable Development
Open-source contributions ensure continuous improvement without corporate sunsetting.
Local Privacy
Run your generations locally. No cloud monitoring or prompt filtering.
Transitioning from Sora to Happy Horse
Happy Horse 1.0 uses a 15B-parameter unified Transformer architecture that mirrors much of the technical progress seen in the Diffusion-Transformer (DiT) era. While Sora excelled in physical simulation, Happy Horse 1.0 delivers a more controlled, production-ready output with native audio synchronization.