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 an addition to the Seedance lineup, not a replacement for it. Seedance 2.0 remains the default Seedance model. The two are a genuine trade-off: 2.5 generates much longer clips and takes a wider set of multimodal references, while 2.0 is the only tier that renders 1080p and 4K.

#Seedance 2.5 or Seedance 2.0?

Seedance 2.5 does not render 1080p or 4K. Its maximum resolution is 720p. If you need a high-resolution master, use Seedance 2.0.

Choose Seedance 2.5 when clip length or the reference budget decides the job: anything longer than 15 seconds, a set of references larger than Seedance 2.0 can accept, an edit pass over an existing video, or extending a clip you already have.

Choose Seedance 2.0 when output resolution decides the job. 1080p and 4K exist only on 2.0, and no Seedance 2.5 setting will produce them. Seedance 2.0 also stays the right default for ordinary short clips.

#Generation limits

• Resolutions: 480p and 720p only. Seedance 2.5 does not support 1080p or 4K.
• Duration: 4 to 30 seconds.
• Frame rate: fixed 24 fps.
• Output: MP4.
• Audio: generated natively together with the video.

#Capabilities

Reference-to-video, video editing, and video extension are all served by Seedance 2.5's multimodal reference path, which is the main capability difference from Seedance 2.0.

#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 30 media items in total. The text prompt does not count toward that 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.

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 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 cheap iteration path. At well under half the 720p rate, it is the sensible place to test prompts and timing before committing to a long 720p 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.

Seedance 2.5 is not yet exposed in the Sogni Chat and Creative Agent tool surfaces. Those surfaces continue to offer Seedance 2.0, Fast, and Mini. This page will be updated when Creative Agent support ships.

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