Seedance2-5 is a Seedance 2.5 video generation service for creators and developers. In the web creator, write a prompt of up to 2,500 characters, add up to 50 image, video, audio or 3D-model references, and pick a length from 4 to 30 seconds. Developers can submit the same jobs as asynchronous tasks through the API and download MP4 results. Output goes up to 1080p, with optional generated audio.