Seedance 2.1 is a new-generation AI video model launched by ByteDance, with upgraded image quality and stability. It offers core functions including text-to-video, image-to-video, video extension and motion replication, and supports HD videos up to 60 seconds in various aspect ratios. It achieves native audio-video synchronization with well-matched sound and visuals. Optimized character movements and shot connections effectively fix common flaws like image distortion. Easy to operate for individual creators, it also supports API access for enterprises. It is widely used in short video production, e-commerce promotion, film storyboards, brand advertisements and other creation scenarios.