Seedance 2.5

What does Seedance 2.5 support?

As reviewed on 28 October 2026, Seedance 2.5 documents 4–30-second output at 480p, 720p or 1080p, plus a 30-image / 10-video / 10-audio reference budget. The inspected ChatCut tool exposes generation, editing and extension controls, but no Draft input. Current Ark boundary and mode probes timed out; those checks remain unverified, distinct from a separate local 30-second previs result.

How are 50 references counted?

The Ark public ID is doubao-seedance-2-5-260628; BytePlus uses dreamina-seedance-2-5-260628. The 50-file budget is 30 images + 10 videos + 10 audios, not 50 of any type. Native audio-only references are documented. Video and audio references are each 2–30 seconds, with 30 seconds aggregate per type. Frame inputs cannot mix with reference mode; a last frame requires a first frame.

Which edit, extend and Draft controls are exposed?

The native API documents explicit reference/edit/extend selectors and Draft-to-final. In the inspected ChatCut integration, Edit requires one source video and a prompt; Extend takes one source and an added duration. The adapter uses prompt classification rather than forwarding the native explicit task selector. Its native selector behavior and extension semantics remain unverified after Ark timeouts. There is no draft or draft-task input in the inspected tool.

Native edit sources are 4–30 seconds. Edit requires adaptive ratio and duration; Extend requires adaptive ratio. Native Draft uses a 480p preview followed by a 1080p final from that draft task; it is distinct from Seedance Mini. Integer-second timestamp prompting belongs to 2.5, without guaranteeing frame-exact cuts. The checked output enum stops at 1080p; full 2.0 has separate native 4K documentation.

Make a short reference-led sequence

1. Choose Seedance 2.5 in the current Video Gen model list and begin with a five-second 16:9, 480p text or first-frame request.
2. For reference mode, label each image, video or audio role and check both counts and total media durations. For Edit or Extend, use that mode's single source slot.
3. Review the current estimate, submit, then inspect completed cuts, subject identity and audio before trimming and assembling on the timeline.

A local previs acceptance run on 27 October exported 30 seconds and passed 15 of 17 checks. Side-view proof failed and speaker/no-music audio remained unresolved. This is a bounded workflow result, not proof of all native controls, route boundaries or production availability.

Credits and next steps

Current rates belong to Credits Policy. Check the preflight quote with the exact provider, model, cohort, resolution, ratio, duration and reference-video duration; token settlement and Agent usage can affect total spend. This review does not establish a current quote or a quality winner.

See the model matrix, full 2.0 limits, Fast and Mini, reference guide and failure recovery.

Last fact review: 28 October 2026. Official sources were accessed on 27 October; integration contracts and saved development checks were reviewed on 28 October. This is dated evidence, not a live certification of every production account. No new paid generation was performed for this page.