Seedance 2.5 - 30 Second Cinematic AI Video

Seedance 2.5 pushes single-generation length to a full 30 seconds, well beyond the 5 to 15 second ceiling of most video models, and adds an Ultra-Long beta mode that extends a single take to 180 seconds. Feed it up to 50 multimodal references, images, video, audio, and text, to lock in characters, style, and sound across the whole clip. Output natively in up to 4K, make timestamp-based and region-level edits without regenerating the whole scene, and pull clean subjects with built-in green-screen editing.