Seedance 2.0 Mini and Fast both cover 4–15 seconds at 480p or 720p in ChatCut’s inspected integration. Full 2.0 adds 1080p here; its documented native 4K is blocked in ChatCut pending pricing. Seedance 2.5 extends the documented range to 30 seconds and adds native Draft controls and an explicit API selector for edit/extend tasks, with important integration gaps. These specifications do not establish a quality or speed winner.
Last verified: October 28, 2026
Official documentation was accessed October 27; ChatCut source and saved route checks were reviewed October 28. The ChatCut column describes the inspected product build, not a fresh production-generation test. See verification scope.
| Version and public Ark model ID | Documented output | ChatCut integration | Source |
|---|---|---|---|
Full 2.0 — doubao-seedance-2-0-260128 | 4–15s; 480p, 720p, 1080p, 4K | 480p/720p/1080p; 4K blocked because pricing is not wired | Official API, Ark tutorial, ChatCut audit |
Fast — doubao-seedance-2-0-fast-260128 | 4–15s; 480p/720p | Those two resolution options; successful boundary jobs not established by this audit | Official API, ChatCut audit |
Mini — doubao-seedance-2-0-mini-260615 | 4–15s; 480p/720p | Both options, default 720p; Mini is not 720p-only | Official API, ChatCut audit |
2.5 — doubao-seedance-2-5-260628 | 4–30s; 480p/720p/1080p | Exposes generation and edit/extend requests; no Draft input; endpoint completion unverified in these probes | Official API, ChatCut audit |
BytePlus uses the corresponding dreamina- model IDs. A public model ID identifies a version; it does not establish entitlement on ChatCut’s configured Ark route.
Which reference modes differ?
| Input or control | Full 2.0 / Fast / Mini | 2.5 | Source |
|---|---|---|---|
| Frames | First frame, or first plus last; no mixing frames with reference mode | Same separation | Official API |
| Reference counts | Up to 9 images, 3 videos, 3 audios; audio needs an image or video | Up to 30 images, 10 videos, 10 audios, 50 combined; audio-only references documented | Official API |
| Reference duration | Video/audio: 2–15s each, up to 15s combined per type | Video/audio: 2–30s each, up to 30s combined per type | Official API |
| Shot timing | Ordered shot descriptions; timestamps are not guaranteed controls | Native timestamp following documented; exact timing still needs review | Official API, ChatCut audit |
| Sound | Native audio switch exists; this ChatCut tool has no toggle | Same tool gap | Official API, ChatCut audit |
Counts alone do not make a valid request: aggregate media duration, file constraints, portrait authorization and moderation still apply. Read generation references before combining media.
Is Mini or Fast the same as Draft?
No. Mini and Fast are model variants. Seedance 2.5’s native Draft workflow uses a 480p preview and a draft task to finalize at 1080p. ChatCut’s inspected submission tool does not forward the native Draft inputs, so Draft is not exposed on ChatCut yet. A lower-resolution normal generation is not that API workflow. Native finalization is described as similar rather than frame-identical. Source: official 2.5 tutorial, accessed October 27, 2026.
Official documentation also lists edit and extend workflows for Full 2.0, Fast and Mini. The explicit native omni_reference_task_type selector is documented for 2.5. Sources: official capability table, task API.
ChatCut exposes 2.5 edit and extend request modes, but the inspected adapter relies on prompt classification rather than forwarding the explicit native task selector. The Ark checks timed out. Treat those controls as exposed requests with unverified endpoint completion, not a demonstrated edit or extension result.
How do matched prices compare?
Use the confirmation quote for the exact model, resolution, aspect ratio, output duration and reference-video duration. Token billing can include input-video duration and minimums; settled credits can differ from an estimate. Current policy belongs to Plans and Credits, with estimate-versus-ledger guidance in generation credits.
No current matched four-model quote or quality/speed benchmark was verified for this article. The inspected Fast/Mini launch promotion has expired; it is not a current discount. A published BytePlus tariff is not automatically the tariff on ChatCut’s Ark route. No Seedance 4K price is available in the inspected ChatCut contract. Sources: ChatCut audit, provider pricing.
Choose a version for a test you can review
| Your requirement | Candidate to inspect | What still needs checking |
|---|---|---|
| A 480p/720p clip within 15 seconds | Full 2.0, Fast or Mini | Current quote, route availability, measured waiting time and visual result |
| 1080p within 15 seconds | Full 2.0 or 2.5 | Exact output dimensions and whether the subject/motion passes your brief |
| More than 15 seconds, up to 30 | 2.5 | Reference duration budget, continuity and exact cuts |
| Native 4K in ChatCut | No verified option in this comparison | Full 2.0 model supports it; ChatCut pricing integration is pending |
| A native Draft-to-final workflow | 2.5 API outside this inspected tool | ChatCut has no Draft control yet |
- Start with your own authorized reference assets and one fixed brief.
- Pick a common supported resolution, ratio and duration when comparing versions. Keep reference inputs identical.
- Review the model and credit estimate before approving each generation.
- Record elapsed time and actual ledger entries. Inspect the full take for motion, identity, sound and cuts.
- Keep the usable take on the timeline, then export and inspect the file. Generation dimensions and export dimensions are separate evidence.
For a different family, read Seedance vs Kling. The model capability matrix and failure guide explain route checks.
Frequently asked questions
What changes in resolution and duration?
Which controls are exposed in ChatCut?
How do matched prices compare?
Verification scope
Last verified 2026-10-28. Native specifications: BytePlus task API, 2.5 tutorial and Ark 2.0 tutorial, accessed 2026-10-27. ChatCut integration: internal source/receipt audit of product beta b3cbb24d, reviewed 2026-10-28; 4K pricing rationale. The configured Ark endpoint was unreachable from the test machine. Its 4K acceptance and the tested boundary requests remain unverified; no provider rejection or successful live generation is inferred from that timeout. No new paid test was run for this article.
