model guide
Seedance 2.5: 30-Second AI Video Model Guide
Seedance 2.5 guide covering 30-second generation, large reference sets, Kansova credit costs per resolution, and how it compares to Seedance 2.0.
TL;DR
ByteDance's Seedance 2.5 extends single-pass generation to 30 seconds with up to 50 reference inputs. It is live on Kansova at 20 credits per second at 480p and 45 at 720p; 2.5 does not render 1080p.
Who this is for
- Creators who need 30-second narrative clips instead of 5-15 second shots.
- Teams tracking ByteDance's video models and planning migrations.
- Marketers comparing long-form AI video options before committing budget.
Best for / Not best for
Best for
- 30-second storytelling
- Large reference sets
- Long-form ad concepts
- Multi-reference image-to-video
Not best for
- Ultra-low-cost drafts
- 1080p or 4K masters (2.5 tops out at 720p)
- Exact on-screen text
- Short clips where Seedance Mini costs less
Parameters
| Parameter | Supported value | Notes |
|---|---|---|
| Max duration | Up to 30 seconds, single pass | Double the Seedance 2.0 ceiling, per ByteDance's announcement. |
| Reference inputs | Up to 50 files | Images, video, and audio references in one generation. |
| Architecture | Built on Seedance 2.0 | Same unified audio-video joint generation system, extended for long-form. |
| Kansova availability | Available | Live in the video studio alongside Seedance 2.0, Mini, Minimax H3, Gemini Omni, Wan 3.0 and FLUX 3 Video. |
Pricing
Kansova bills generations in credits. Basic is $9.90/month for 300 credits; Pro is $19/month for 750 credits; Studio is $39/month for 1,700 credits.
| Generation | Kansova credits | Cost methodology |
|---|---|---|
| Seedance 2.5 | 20 credits/sec (480p), 45 (720p) | About $0.19-$0.42/sec provider cost |
| Seedance 2.0 | 15 credits/sec (480p) / 30 credits/sec (720p) | Shown before generation |
Comparison
| Dimension | Seedance 2.5 | Seedance 2.0 | Minimax H3 | Gemini Omni |
|---|---|---|---|---|
| Max duration | 30 seconds | 15 seconds | 15 seconds | 10 seconds |
| Kansova access | Available | Available | Available | Available |
| Reference inputs | Up to 50 files | Up to 12 files | Up to 12 files | Up to 16 images |
| Public API pricing | Priced | Priced | Priced | Priced |
| Best workflow | Long-form storytelling | Campaign output | 2K product shots | General short clips |
Prompt examples
- 01
A glass skincare bottle rises through clear blue water, slow push-in, suspended droplets, premium studio highlights, 9:16. - 02
Slow forward movement toward a modern concrete villa at blue hour, warm interior lights reflected in the pool. - 03
A white sneaker rotates on a matte plinth, soft directional light moves across the material, clean ecommerce campaign. - 04
Macro shot of a watch mechanism starting to move, shallow depth of field, restrained luxury advertising style. - 05
A folded paper sculpture opens into a geometric flower, fixed camera, soft shadows, minimal design film.
Known limitations
- Seedance 2.5 bills per requested second, so a 10-second 720p clip costs 450 credits; budget long-form runs before submitting.
- Costs follow Volcengine's official per-second rates as of 2026-09-04 and may be revised after real usage data.
- Longer generations increase the chance of drift across scenes; review output before commercial use.
- Seedance 2.5 does not render 1080p or 4K upstream; 720p is the ceiling. Plan an external upscale step if a delivery spec requires more.
- Announcements may change; verify current status before planning production around 2.5.
Alternatives
Frequently asked questions
Is Seedance 2.5 available on Kansova?
Yes. Seedance 2.5 is live in the Kansova video studio, with up to 30 seconds in a single pass and up to 50 reference inputs.
What is new in Seedance 2.5 vs 2.0?
Single-pass generation extends to 30 seconds, reference inputs grow to up to 50 files, and ByteDance positions it for long-form storytelling on the same architecture.
How much does Seedance 2.5 cost?
Kansova charges 20 credits per second at 480p and 45 at 720p. A 10-second 720p clip is 450 credits; the studio shows the exact cost before you submit.
Does Seedance 2.5 support 1080p?
No. Seedance 2.5 tops out at 720p upstream, so Kansova only offers 480p and 720p for it. If a delivery spec needs 1080p or 4K, plan an external upscale step or use a model that renders those tiers natively.
Last updated
2026-09-05
Sources and methodology
Parameters were checked against the provider API material supplied to Kansova and the live Kansova controls on 2026-07-06. Reference API costs are planning figures from the supplied provider catalog, not a separate charge billed by Kansova.
- EvoLink API documentation index
Provider documentation used to verify Seedance modes and parameters.
- Kansova product facts
Canonical list of supported workflows and current limitations.
- Kansova pricing
Current subscription and monthly credit allowances.