Overview

Seedance 2.0 provides high-quality video generation from text prompts, with multiple modes supporting text-to-video, first/last frame control, and multi-modal omni references (images / videos / audio). This document describes the available models, pricing, modes, usage guidelines, and the syntax for referencing media in your prompts.

Currently available models

Two tiers, each with a standard (strict moderation) and a less-restriction variant:

Model	Tier	Content moderation
`seedance-2`	Pro, higher quality	Strict
`seedance-2-fast`	Fast, lower cost	Strict
`seedance-2-less-restriction`	Pro	Less restrictive
`seedance-2-fast-less-restriction`	Fast	Less restrictive

The -less-restriction variants apply a more permissive content review. They accept exactly the same input schema as the strict variants but bill at a +25% markup (see Pricing). They are not retried on content rejection — see Content Moderation below.

Deprecated task types (auto-redirected)

The following legacy task types continue to be accepted for backwards compatibility and are silently redirected to the strict formal models. Please migrate to the active models above:

Deprecated task type	Now equivalent to
`seedance-2-preview`	`seedance-2`
`seedance-2-fast-preview`	`seedance-2-fast`
`seedance-2-preview-vip`	`seedance-2`
`seedance-2-fast-preview-vip`	`seedance-2-fast`

Existing clients sending the deprecated task types will continue to work without code changes. Note that the formal models default to 480p resolution; if you previously relied on the preview-vip default of 720p, pass resolution: "720p" explicitly to preserve output quality.

Pricing

Model	Resolution	Price per second
seedance-2	480p	$0.10
seedance-2	720p	$0.20
seedance-2	1080p	$0.50
seedance-2-fast	480p	$0.08
seedance-2-fast	720p	$0.16
seedance-2-less-restriction	480p	$0.125
seedance-2-less-restriction	720p	$0.25
seedance-2-less-restriction	1080p	$0.625
seedance-2-fast-less-restriction	480p	$0.10
seedance-2-fast-less-restriction	720p	$0.20

The -less-restriction variants are priced at a +25% markup over the matching strict tier and resolution.

seedance-2-fast / seedance-2-fast-less-restriction do not support 1080p output.

Cost calculation:

Without input videos: credits = unit_price × output_duration

With input videos: credits = unit_price × output_duration + (unit_price / 2) × total_input_video_duration

Duration Limits

Maximum output duration: 15 seconds (API enforces integer 4–15).

Maximum total input video duration: 15.4 seconds (sum of all reference videos).

Modes

The mode parameter determines how references are used and which parameters take effect.

mode is optional — when omitted, it is automatically inferred from the input:

No references → text_to_video

1–2 images only (no videos, no audios) → first_last_frames

Any other combination of references → omni_reference

You may also pass mode explicitly to enforce strict validation.

text_to_video

Pure text-to-video generation. No references accepted.

duration: user-controlled (4–15s)

aspect_ratio: user-controlled (6 options)

first_last_frames

Use 1–2 images as the first and/or last frame of the generated video.

image_urls: 1–2 images required. Only images accepted — video and audio URLs are rejected.

duration: user-controlled (4–15s)

aspect_ratio: user-controlled (6 options), or auto to derive from the first image

Supported image formats: jpg, jpeg, png, webp, bmp

omni_reference

Use 1–12 mixed references (images, videos, audio) for flexible multi-modal generation.

image_urls: optional, images as style/content references

video_urls: optional, videos as motion/style references (formats: mp4, mov)

audio_urls: optional, audio as soundtrack (mp3/wav only, must be ≤15 seconds total)

duration: user-controlled (4–15s)

aspect_ratio: user-controlled (6 options)

Audio-only is not allowed — at least one image or video reference must be provided alongside audio.

Total references (images + videos + audios) must be between 1 and 12.

Important Notes & Special Cases

Parameter behavior by mode

Parameter	text_to_video	first_last_frames	omni_reference
duration	User input (4–15)	User input (4–15)	User input (4–15)
aspect_ratio	User input (6 options)	User input or `auto` (from image)	User input (6 options)
image_urls	Not allowed	1–2 required	optional (shared 12 max)
video_urls	Not allowed	Not allowed	optional (shared 12 max)
audio_urls	Not allowed	Not allowed	optional (shared 12 max)

Aspect ratio

Supported values: 21:9, 16:9, 4:3, 1:1, 3:4, 9:16. The value auto is only available in first_last_frames mode (derives from the first image).

Default: 16:9 (auto becomes 16:9 if no image is provided).

Duration

Range: 4 to 15 seconds (any integer).

Default: 5 seconds (when omitted or out of range).

Resolution

Supported values: 480p (default), 720p, 1080p.

1080p is not supported on the seedance-2-fast / seedance-2-fast-less-restriction tiers.

Audio constraints

Audio references are only accepted in omni_reference mode.

Supported formats: mp3, wav only.

Maximum total audio duration: 15 seconds. The upstream silently rejects longer audio (the upload will time out with no explicit error message); the API pre-validates duration to surface this early.

Audio-only submissions are rejected — at least one image or video must accompany any audio references.

Content moderation

All four models apply content moderation. Submissions found to contain disallowed content are rejected and your credits are refunded.

seedance-2 / seedance-2-fast (strict): on a content rejection, the task may be retried once via an alternate review path that typically resolves prompts flagged for style / advertising / character intent.

seedance-2-less-restriction / seedance-2-fast-less-restriction: the primary review is itself less restrictive, and there is no further retry on rejection — a rejection is final, your credits are refunded, and the task ends with a content-violation error.

Peak hours

From 09:00 to 15:00 GMT, Seedance experiences high traffic. Queue times may extend to several hours during this period.

Using References in Prompts

When you include references, you can mention them in the prompt using @-syntax.

Syntax

@image1, @image2, … — reference images by position in image_urls (1-based)

@video1, @video2, … — reference videos by position in video_urls (1-based)

@audio1, @audio2, … — reference audios by position in audio_urls (1-based)

Chinese format also supported: @图片1, @视频1, @音频1 (with or without _ between the type and the number)

Examples

Single image

The cat in @image1 walks through a garden

Image + video + audio

Apply @image1 artistic style with @video1 motion and @audio1 soundtrack

Morphing

@image1 transforms into @image2

Validation

If your prompt references a material that was not provided (e.g. @image3 but only 2 images supplied), the request is rejected with a descriptive error message. The same applies to @videoN and @audioN.

Tips

Use publicly accessible URLs (e.g. hosted on a CDN or cloud storage). Signed / expiring URLs may fail.

Keep input videos short (5–15 seconds) for best results.

Describe the desired output clearly in your prompt.

application/json

Bodyapplication/json

Examples

Task created (pending)Completed

{
    "code": 200,
    "data": {
        "task_id": "07ed43de-465d-43b1-b62c-44249b14d818",
        "model": "seedance",
        "task_type": "seedance-2-fast",
        "status": "pending",
        "config": {
            "service_mode": "",
            "webhook_config": {
                "endpoint": "",
                "secret": ""
            }
        },
        "input": {
            "prompt": "A woman sings and strums her guitar",
            "mode": "text_to_video",
            "duration": 5,
            "aspect_ratio": "16:9"
        },
        "output": null,
        "meta": {
            "created_at": "2026-04-05T13:33:26.10346684Z",
            "started_at": "0001-01-01T00:00:00Z",
            "ended_at": "0001-01-01T00:00:00Z",
            "usage": {
                "type": "point",
                "frozen": 4000000,
                "consume": 0
            },
            "is_using_private_pool": false
        },
        "detail": null,
        "logs": [],
        "error": {
            "code": 0,
            "raw_message": "",
            "message": "",
            "detail": null
        }
    },
    "message": "success"
}

Seedance 2

Overview

Currently available models

Deprecated task types (auto-redirected)

Pricing

Duration Limits

Modes

text_to_video

first_last_frames

omni_reference

Important Notes & Special Cases

Parameter behavior by mode

Aspect ratio

Duration

Resolution

Audio constraints

Content moderation

Peak hours

Using References in Prompts

Syntax

Examples

Single image

Image + video + audio

Morphing

Validation

Tips

Request

Request Code Samples

Responses

Seedance 2

Overview#

Currently available models#

Deprecated task types (auto-redirected)#

Pricing#

Duration Limits#

Modes#

text_to_video#

first_last_frames#

omni_reference#

Important Notes & Special Cases#

Parameter behavior by mode#

Aspect ratio#

Duration#

Resolution#

Audio constraints#

Content moderation#

Peak hours#

Using References in Prompts#

Syntax#

Examples#

Single image#

Image + video + audio#

Morphing#

Validation#

Tips#

Request

Request Code Samples

Responses

Overview

Currently available models

Deprecated task types (auto-redirected)

Pricing

Duration Limits

Modes

text_to_video

first_last_frames

omni_reference

Important Notes & Special Cases

Parameter behavior by mode

Aspect ratio

Duration

Resolution

Audio constraints

Content moderation

Peak hours

Using References in Prompts

Syntax

Examples

Single image

Image + video + audio

Morphing

Validation

Tips