OpenAI announced on March 12, 2026, significant expansions to its Sora 2 Video API, introducing custom character persistence, extended clip lengths up to 20 seconds, and new aspect ratio support. This marks the first time Sora's video generation capabilities have been exposed to developers through an API, as Sora 1 is officially deprecated on March 13, 2026.
Custom Characters and Extended Generation Capabilities
The expanded API now supports custom characters and objects that can be reused across multiple video generations, enabling consistent visual storytelling. Video clips can now reach 20 seconds in length, up from previous limitations, and support both 16:9 and 9:16 aspect ratios for horizontal and vertical content. The API also includes a video continuation feature that allows users to extend completed scenes, plus batch job capabilities for efficient large-scale video generation.
Two Model Variants for Different Use Cases
OpenAI offers two distinct model variants through the API. The standard "sora-2" model is designed for speed and flexibility, generating good quality results quickly and making it ideal for the exploration phase of creative projects. The "sora-2-pro" variant delivers higher quality results with longer render times and higher costs, producing more polished and stable videos suitable for final production work.
Technical Improvements Over Sora 1
Sora 2 demonstrates significant technical advances, generating more physically accurate and realistic videos than its predecessor. The model shows improved controllability with the ability to follow intricate multi-shot instructions and accurately persist world state across different shots. Videos now feature synchronized dialogue and sound effects, enhancing the overall production quality and usability for professional applications.
API Features Enable Complex Video Workflows
Developers can create new videos from text prompts, guide generation with image references, and reuse character assets across multiple projects. The API supports continuing completed clips with video extensions and editing existing videos with targeted changes. These capabilities enable sophisticated video production workflows previously unavailable through automated systems, opening new possibilities for content creators and developers.
Key Takeaways
- OpenAI expanded Sora 2 Video API on March 12, 2026, with custom character persistence, 20-second clips, and 16:9/9:16 aspect ratio support
- Two model variants are available: sora-2 for speed and flexibility, and sora-2-pro for higher quality production work
- Sora 1 was officially deprecated on March 13, 2026, making Sora 2 the sole experience on sora.com
- Technical improvements include more physically accurate videos, better multi-shot instruction following, and synchronized dialogue and sound effects
- The API enables developers to create, extend, and edit videos with text prompts, image references, and batch processing capabilities