Seedance 2.5 timestamp-level editing: what Sume exposes today
ByteDance describes timestamp-level editing and 30-second clips for Seedance 2.5. See which of those fields Sume's Video Router accepts for seedance-2.5.
Seedance 2.5 is sold on three ideas: long single takes, reference-driven creation and editing. ByteDance's launch post describes up to 30 seconds per generation with multi-round extension, timestamp-level editing, and up to 30 images, 10 videos and 10 audio references (read 2026-10-03). Sume's seedance-2.5 row accepts less than that description, so read the model list before you plan around it.
Vendor claim against Sume's row
| Capability | ByteDance post | Sume seedance-2.5 |
|---|---|---|
| Clip length | Up to 30 s per generation | 4 to 30 s |
| Resolution | Not stated here | 480p, 720p, 1080p |
| Reference limits | 30 images, 10 videos, 10 audio | At most 9 images, 3 videos, 3 audio, 12 total |
| Prompted video edit | Timestamp-level editing | Not exposed; video_to_video is false |
What to do about the gap
If the job is a prompt edit of existing footage, Sume's route is gemini-omni-flash-1.1 with video_url. If it is a long generation, seedance-2.5 handles up to 30 seconds in one request. Treat vendor launch posts as a ceiling for the model, and Sume's catalog as what your request is validated against.
Sources
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