ByteDance: seedance-2.0-fast

Seedance 2.0 Fast is ByteDance's speed-optimized entry in the Seedance 2.0 series. It shares a unified multimodal architecture with standard Seedance 2.0 and is distilled for faster generation. It accepts text, image, video, and audio input and outputs video with native synchronized audio, covering text-to-video, image-to-video, and video-to-video generation. Clips range from 4 to 15 seconds at 480p, 720p, or 1080p. Multi-reference input includes first-frame and last-frame control, up to 9 reference images, and up to 3 reference videos of 2 to 15 seconds each. Prompts can also edit specified segments or extend existing video. These controls make the model practical for reference-guided clips and for iterating on a direction without rebuilding each shot from scratch. Seedance 2.0 Fast is best suited to rapid video prototyping, advertising drafts, storyboard visualization, social media creative variants, and batch creative exploration—especially workflows that generate many candidate versions before selecting a final direction. Teams should note weaker multi-subject consistency, limited text generation and complex editing, occasional audio distortion, fewer generation modes and resolution options than standard Seedance 2.0, and no 4K support.