Seedance 2.5 video
Seedance 2.5 is a ByteDance video model served through the BytePlus ModelArk API. On Sogni its model id is seedance-2-5.
Seedance 2.5 is the latest Seedance generation and the default for current storyboard workflows. It generates longer clips, accepts a wider set of multimodal references, and renders up to 1080p. Seedance 2.0 remains available for 4K output.
#Seedance 2.5 or Seedance 2.0?
Seedance 2.5 renders up to 1080p. It does not render 4K; use Seedance 2.0 for a 4K master.
| Seedance 2.5 | Seedance 2.0 | |
|---|---|---|
| Resolutions | 480p, 720p, 1080p | 480p, 720p, 1080p, 4K |
| Clip length | 4–30 seconds | 4–15 seconds |
| Frame rate | 24 fps | 24 fps |
| Native audio | Yes | Yes |
| Reference workflows | Reference-to-video, video editing, video extension | Reference-to-video, video editing, video extension |
| Reference images | Up to 30 | Up to 9 |
| Reference videos | Up to 10 | Up to 3 |
| Reference audio clips | Up to 10 | Up to 3 |
| Total media per request | 50 items | 12 assets |
| Default choice | Yes | Use for 4K |
Choose Seedance 2.5 for current storyboard workflows, output up to 1080p, clips longer than 15 seconds, first-and-last-frame transitions, or a set of references larger than Seedance 2.0 can accept.
Choose Seedance 2.0 when the job specifically requires 4K. It remains available for compatibility with existing workflows.
#Generation limits
- Resolutions: 480p, 720p, and 1080p. Seedance 2.5 does not support 4K.
- Duration: 4 to 30 seconds.
- Frame rate: fixed 24 fps.
- Output: MP4.
- Audio: generated natively together with the video.
#Capabilities
| Mode | Inputs |
|---|---|
| Text to video | Prompt |
| Image to video | Prompt + first frame |
| First and last frame | Prompt + first and last frames |
| Reference to video | Prompt + reference media |
| Video editing | Prompt + source video |
| Video extension | Prompt + source video |
Reference-to-video, video editing, and video extension are all served by Seedance 2.5's multimodal reference path. Seedance 2.0 exposes the same modes; the difference is scale, not the mode list — 2.5 takes a much larger reference set and renders up to 30 seconds per call.
#Reference limits
A single Seedance 2.5 request accepts up to 30 reference images, 10 reference videos, and 10 reference audio clips, for a maximum of 50 media items in total. The per-modality caps apply on top of that total, so 50 items is only reachable by combining all three kinds. The text prompt does not count toward the cap.
That is a large increase over Seedance 2.0, Fast, and Mini, which accept up to 9 reference images, 3 reference videos, and 3 reference audio clips, for 12 assets in total. If a job needs more reference material than 2.0 can take, that is the clearest reason to pick 2.5.
#Pricing
Seedance 2.5 is priced per second of finished video, and the per-second rate depends on the resolution you select. Values below use the standard 1 Spark = $0.005 peg. The fixed examples cover 480p and 720p; use the live estimate for a concrete 1080p request.
| Resolution | Per second | 5 seconds | 10 seconds | 30 seconds |
|---|---|---|---|---|
| 720p | $0.300456 | $1.50 | $3.00 | $9.01 |
| 480p | $0.133640 | $0.67 | $1.34 | $4.01 |
Totals are computed from the exact per-second rates above, so a long clip does not match a rounded rate multiplied out by hand — 30 seconds at 720p is $9.01, not $9.00.
In Spark, at 720p that is about 60.1 Spark per second — 300.5 Spark for 5 seconds, 600.9 Spark for 10 seconds, and 1,802.7 Spark for a full 30-second clip. At 480p it is about 26.7 Spark per second, so 133.6 Spark for 5 seconds, 267.3 Spark for 10 seconds, and 801.8 Spark for 30 seconds.
- Duration and resolution are the price. A 30-second 720p clip costs roughly six times a 5-second one.
- Jobs with video input cost less per second than text-to-video. Video editing and video extension therefore quote below the rates above for the same length and resolution.
- 480p is a cheaper iteration path. At about 44% of the 720p rate, it is a sensible place to test prompts and timing before committing to a long 720p or 1080p render.
For an exact per-job quote at any duration, use the job estimate calculator, which quotes live from the current Sogni pricing endpoints.
#Access
Seedance 2.5 is a Premium Spark model with credit-card premium coverage checks, matching the other Seedance tiers. Like Seedance 2.0, Fast, and Mini, it is a third-party vendor API model and is not covered by any Sogni subscription tier — see Unlimited plan details.
Seedance renders on the external ByteDance/BytePlus vendor path, so a Seedance job does not consume Sogni GPU worker capacity.
#Where you can use it
Seedance 2.5 is available in Sogni Web through the ByteDance video flow with the required Premium Spark balance.
It is also selectable in the Creative Agent tool surfaces as the videoModel value seedance2-5, accepted by generate_video, sound_to_video, and video_to_video (with controlMode="seedance-v2v"). animate_photo does not take any Seedance model — use generate_video with reference indices instead. Seedance 2.0 and Mini remain available as seedance2 and seedance2-mini; the legacy seedance2-fast selector now routes to Mini, which is faster and cheaper.
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