Seedance 2.5 doubles AI video to 30 seconds

ByteDance launched Seedance 2.5 with 30-second audiovisual generations, double Seedance 2.0’s 15-second ceiling, plus multi-round extensions for longer sequences. The official release says one pass can take as many as 30 images, 10 video clips, and 10 audio clips as references, although API access through BytePlus ModelArk is still coming rather than live. Creative teams comparing it with FLUX 3’s gated 20-second video promise should test identity continuity and cost per accepted shot before switching; duration has moved, but deployability and independent quality evidence still lag the demo.