ByteDance's Volcano Engine released the Seedance 2.5 flash video model, offering twice the generation speed of its predecessor at a significantly lower price point. At 720P resolution, text-to-video and image-to-video generation costs approximately 0.99 yuan per second — roughly 34% cheaper than the standard Seedance 2.5 model. The new model supports single videos up to 30 seconds long, accepts inputs of up to 10 images, 5 videos, and 5 audio clips, and offers two resolution tiers: 480P and 720P. Overall performance surpasses the previous-generation flagship Seedance 2.0, with improvements in instruction following, physical motion rendering, and audio handling, plus added video editing capabilities. Seedance 2.5 flash is rolling out across platforms including Dreamina, LibTV, and Updream starting today, with API access on Volcano Ark scheduled for November 15.