Source: https://docs.sogni.ai/models/seedance-2-5/

# 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](https://www.sogni.ai/models/seedance-2-0) remains available for 4K output.

## [#](https://docs.sogni.ai/models/seedance-2-5/#seedance-25-or-seedance-20)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.

## [#](https://docs.sogni.ai/models/seedance-2-5/#generation-limits)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.

## [#](https://docs.sogni.ai/models/seedance-2-5/#capabilities)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.

### [#](https://docs.sogni.ai/models/seedance-2-5/#reference-limits)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.

## [#](https://docs.sogni.ai/models/seedance-2-5/#pricing)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](https://docs.sogni.ai/pricing/#calculator), which quotes live from the current Sogni pricing endpoints.

## [#](https://docs.sogni.ai/models/seedance-2-5/#access)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](https://docs.sogni.ai/pricing/unlimited-plan-details/#4-included-models-and-tools).

Seedance renders on the external ByteDance/BytePlus vendor path, so a Seedance job does not consume Sogni GPU worker capacity.

## [#](https://docs.sogni.ai/models/seedance-2-5/#where-you-can-use-it)Where you can use it

Seedance 2.5 is available in **[Sogni Web](https://app.sogni.ai/video/seedance/text2video?model_id=seedance-2-5)** 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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