ByteDance officially releases Seedance 2.5
ByteDance officially released Seedance 2.5, which generates up to 30 seconds of audio and video in one pass and accepts as references up to 30 images, 10 video clips, and 10 audio clips.
What happened
Event details
ByteDance Seed officially released Seedance 2.5 on July 31, 2026. The model generates up to 30 seconds of audio and video in one pass and supports multi-round extension. A single generation can use up to 30 images, 10 video clips, and 10 audio clips as references, with timestamp-level editing for targeted audio and video changes. Seedance 2.5 began rolling out through Jimeng AI, Doubao Pro, and other platforms, while BytePlus ModelArk API access was announced as coming soon.
Assessment
Why it matters
Seedance 2.5 extended single-pass audio-video generation to 30 seconds, increased multimodal reference capacity, and added stronger long-form storytelling, extension, and targeted editing capabilities.
Availability
Access notes
The model is rolling out through Jimeng AI, Doubao Pro, and other platforms; BytePlus ModelArk API access is not yet generally available.