Video

Seedance 2.5 API

The Seedance 2.5 API gives you ByteDance's audio-video foundation model for production AI video: native 30-second single-pass clips at up to 1080p, up to 50 multimodal references (30 images, 10 videos, 10 audio clips), first/last-frame control, and video edit and extend for ads, e-commerce, and film previs. It is the same model offered as Dreamina Seedance 2.5.

AI Video30s ClipsMultimodal ReferenceNative Audio

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Service Highlights

Official Discounts
Pay-as-you-go
Fast & Low Latency

Input

Model

Draft mode

Generate a 480p draft first, then create a 1080p final video when you are happy with it. Each generation is billed separately.

Reference Task Type

Explicit types validate task constraints before creation. The prompt must still match the selected type or TaskTypeMismatch may fail asynchronously.

Prompt

Duration

Auto

Aspect Ratio

Resolution

Output Format

Seed

Reference Image

Asset URL0/30

Image with Roles

First Frame

Last Frame

Reference Image

Asset URL0/2

Asset URL0/30

First/last frame tasks require Adaptive. When video or audio references are present, frame roles are treated as reference images.

Reference Video

Asset URL0/10

Reference Audio

Upload reference audio

WAV, MP3 (max 15MB, up to 10 audios, duration ≤ 30s)

Audio URL0/10

Output

Video link valid for 72 hours

Seedance 2.5 API Pricing

Transparent pricing with no hidden fees. Pay only for what you use.

Estimated Price

Variant	Tier	GoldCurrent price	Platinum	Diamond	Official	Your savings
`seedance-2.5`	480P-input	0.576Credits(~$0.0576)/secWith reference video: (reference duration + generation duration) × current price	0.5472Credits(~$0.0547)/sec	0.5184Credits(~$0.0518)/sec	0.72Credits(~$0.072)/sec	20%
	480P	0.9608Credits(~$0.0961)/sec	0.9128Credits(~$0.0913)/sec	0.8647Credits(~$0.0865)/sec	1.201Credits(~$0.1201)/sec	20%
	720P-input	1.296Credits(~$0.1296)/secWith reference video: (reference duration + generation duration) × current price	1.2312Credits(~$0.1231)/sec	1.1664Credits(~$0.1166)/sec	1.62Credits(~$0.162)/sec	20%
	720P	2.16Credits(~$0.216)/sec	2.052Credits(~$0.2052)/sec	1.944Credits(~$0.1944)/sec	2.7Credits(~$0.27)/sec	20%
	1080P-input	3.192Credits(~$0.3192)/secWith reference video: (reference duration + generation duration) × current price	3.0324Credits(~$0.3032)/sec	2.8728Credits(~$0.2873)/sec	3.99Credits(~$0.399)/sec	20%
	1080P	5.346Credits(~$0.5346)/sec	5.0787Credits(~$0.5079)/sec	4.8114Credits(~$0.4811)/sec	6.6825Credits(~$0.6683)/sec	20%

Token Pricing

Variant	Tier	GoldCurrent price	Platinum	Diamond	Official	Your savings
`seedance-2.5`	`token-input`480p / 720p · With reference video	60Credits/1M tokens~$6/1M tokens	57Credits/1M tokens~$5.7/1M tokens	54Credits/1M tokens~$5.4/1M tokens	75Credits/1M tokens~$7.5/1M tokens	20%
	`token`480p / 720p · Without reference video	100Credits/1M tokens~$10/1M tokens	95Credits/1M tokens~$9.5/1M tokens	90Credits/1M tokens~$9/1M tokens	125Credits/1M tokens~$12.5/1M tokens	20%
	`token-1080P-input`1080p · With reference video	65.68Credits/1M tokens~$6.568/1M tokens	62.396Credits/1M tokens~$6.2396/1M tokens	59.112Credits/1M tokens~$5.9112/1M tokens	82.1Credits/1M tokens~$8.21/1M tokens	20%
	`token-1080P`1080p · Without reference video	110Credits/1M tokens~$11/1M tokens	104.5Credits/1M tokens~$10.45/1M tokens	99Credits/1M tokens~$9.9/1M tokens	137.5Credits/1M tokens~$13.75/1M tokens	20%

* Actual costs are subject to final output.

* Without a reference video: generation duration × output price. With one: (reference duration + generation duration) × input price.

* Resolution rates are precharge estimates; Auto reserves 30 output seconds. Successful tasks are reconciled using actual token usage.

ByteDance Seedance 2.5 API for 30-Second AI Video

Generate longer single-pass clips with native audio, dense multimodal references, and a draft-to-final workflow through the Seedance 2.5 API on APIMart.

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Uptime

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Key Features of the Seedance 2.5 API

ByteDance's newest Seedance model for longer, more controllable AI video production

30-Second Videos in One Pass with the Seedance 2.5 API

Set duration from 4 to 30 seconds, or -1 to let the model choose. Each Seedance 2.5 API request is one continuous take that keeps motion, identity, and lighting consistent without stitching short clips.

Up to 50 Multimodal References in the Seedance 2.5 API

In one Seedance 2.5 API request, combine up to 30 images, 10 videos, and 10 audio clips and refer to each by index in the prompt. Audio-only references are supported.

Text to Video and Image to Video with Seedance2.5

Start from a prompt alone, or add image_urls as reference images for products, characters, and scenes. The Seedance 2.5 API handles both modes on one /v1/videos/generations endpoint.

First and Last Frame Control in the Seedance 2.5 Model

In the Seedance 2.5 API, pass a first frame, or first and last frames, through image_with_roles to guide camera and subject movement between keyframes. Frame tasks use size adaptive.

Native Audio in the Same Pass

Video and sound are generated together, so dialogue, effects, and music arrive in sync in one Seedance 2.5 API task. generate_audio is on by default; set it to false for silent clips.

Video Edit and Extend with the Seedance 2.5 API

Add a source clip through video_urls, then describe what to add, remove, or replace, or ask to extend it forward or backward. In the Seedance 2.5 API, set omni_reference_task_type to edit or extend to check limits at submit time.

3D Blockout References for Scene Layout

Send renders of textureless 3D models to the Seedance 2.5 API as references to lock scene layout, poses, and camera angles before the final look is generated.

480p Draft to 1080p Final in the Seedance 2.5 API

Preview a shot as a 480p draft with draft: true, then pass its task ID as draft_task_id to render the 1080p final with the same prompt, references, and seed. Seedance 2.5 API drafts stay valid for 7 days.

What You Can Build with the Seedance 2.5 API

Production scenarios for 30-second AI video on APIMart

30-Second Social Ads with the Seedance 2.5 API

Generate 15–30 second Seedance 2.5 API campaign variants with locked product identity, brand style, and native audio for multi-channel ad testing.

E-commerce Product Videos with the Seedance 2.5 AI Video Generator

Send product photos to the Seedance 2.5 API as references to keep packaging, color, and detail consistent across lifestyle shots and close-up demos.

Film Previs and Storyboards

Turn scripts, keyframes, and 3D blockout renders into longer Seedance 2.5 API previs clips for camera planning and narrative pacing.

Video Continuations with the Seedance 2.5 API

With the Seedance 2.5 API, extend an existing clip forward or backward, or set return_last_frame to start the next generation from the final frame.

Education Clips

Use the Seedance 2.5 API to turn multi-step concepts into a single narrated clip with clearer scene structure.

Short Brand Films

Use the Seedance 2.5 API to produce polished short brand films and internal communications with controlled motion, lighting, and identity consistency.

How to Get a Seedance 2.5 API Key and Start Building

Go from sign-up to your first 30-second clip in three steps

Get Your Seedance 2.5 API Key

Register on APIMart and create a key on the API Keys page. The same key works for the Seedance 2.5 API and every other model on the platform.

→

Test the Seedance 2.5 API in the Playground

Try prompts, references, duration, and resolution in the playground above before you call the Seedance 2.5 API from code.

→

Integrate the Seedance 2.5 API into Your App

Follow the API documentation to submit Seedance 2.5 API tasks from your backend and poll for the finished video.

Start Creating

Seedance 2.5 API Example: Text to Video and Image to Video

Call ByteDance Seedance 2.5 on APIMart with one POST request. Seedance 2.5 API generation is asynchronous: submit a task, then poll the task endpoint to get the video URL.

1
Authenticate Seedance 2.5 API requests
Save the key you created above in the APIMART_API_KEY environment variable and send it as Authorization: Bearer <key> on every Seedance 2.5 API request.
2
Submit a Seedance 2.5 task
POST /v1/videos/generations with model seedance-2.5, your prompt, size, resolution and duration. Add image_urls, video_urls or audio_urls for references. The Seedance 2.5 API responds with a task_id.
3
Get the Seedance 2.5 result
Poll GET /v1/tasks/{task_id} every 5–15 seconds until status is completed, then read the video URL from data.result.videos[0].url[0]. A failed Seedance 2.5 API task is fully refunded and returns the reason in data.error.message.
See the Seedance 2.5 API reference for every parameter, task type limit and response field.

POST /v1/videos/generations

curl -X POST https://api.apimart.ai/v1/videos/generations \
  -H "Authorization: Bearer $APIMART_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.5",
    "prompt": "A cinematic tracking shot of a red vintage car driving along a coastal road at sunset, waves crashing below, warm golden light",
    "size": "16:9",
    "resolution": "720p",
    "duration": 10
  }'

import os
import time
import requests

API_BASE = "https://api.apimart.ai"
headers = {"Authorization": f"Bearer {os.environ['APIMART_API_KEY']}"}

# 1. Submit the generation task
payload = {
  "model": "seedance-2.5",
  "prompt": "A cinematic tracking shot of a red vintage car driving along a coastal road at sunset, waves crashing below, warm golden light",
  "size": "16:9",
  "resolution": "720p",
  "duration": 10
}
resp = requests.post(f"{API_BASE}/v1/videos/generations", headers=headers, json=payload, timeout=60)
resp.raise_for_status()
task_id = resp.json()["data"][0]["task_id"]

# 2. Poll the task until it finishes
for _ in range(200):
    task_resp = requests.get(f"{API_BASE}/v1/tasks/{task_id}", headers=headers, timeout=30)
    task_resp.raise_for_status()
    task = task_resp.json()["data"]
    if task["status"] == "completed":
        print(task["result"]["videos"][0]["url"][0])
        break
    if task["status"] == "failed":
        raise RuntimeError(task.get("error", {}).get("message", "generation failed"))
    time.sleep(10)
else:
    raise TimeoutError(f"task {task_id} did not finish in time")

curl -X POST https://api.apimart.ai/v1/videos/generations \
  -H "Authorization: Bearer $APIMART_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2.5",
    "prompt": "The product from the reference image rotates slowly on a white studio turntable, soft key light, the camera pushes in to a close-up of the label",
    "image_urls": [
      "https://example.com/product.jpg"
    ],
    "size": "16:9",
    "resolution": "720p",
    "duration": 10
  }'

TASK_ID="task_xxx"  # replace with the task_id returned by the POST request
curl "https://api.apimart.ai/v1/tasks/$TASK_ID" \
  -H "Authorization: Bearer $APIMART_API_KEY"

Seedance 2.5 API Parameters

Parameter	Type	Required	Default	Description
`model`	string	Required	Default: seedance-2.5	Fixed value for the Seedance 2.5 API: seedance-2.5 (listed upstream as doubao-seedance-2-5).
`prompt`	string	Required	Default: —	Video description. Refer to inputs by index, such as @图片1, @视频1 or @音频1 (1-based, in array order). Required for normal and draft generation; do not send it with draft_task_id, or the request returns 400.
`resolution`	string	Optional	Default: 720p	480p, 720p or 1080p. The Seedance 2.5 API returns a 400 error for 2k and 4k.
`size`	string	Optional	Default: adaptive	Aspect ratio (also accepted as aspect_ratio): 16:9, 4:3, 1:1, 3:4, 9:16, 21:9 or adaptive. Video edit, video extend and first/last-frame tasks require adaptive.
`duration`	integer	Optional	Default: 5	Seedance 2.5 API clip length: 4–30 seconds, or -1 to let the model choose (precharged as 30 seconds, then settled on the actual output).
`generate_audio`	boolean	Optional	Default: true	Generate synced audio (also accepted as audio). Set false for a silent video.
`image_urls`	array	Optional	Default: —	Up to 30 Seedance 2.5 API reference images as URLs or asset:// IDs. Use image_with_roles for first and last frames.
`image_with_roles`	array	Optional	Default: —	Images with a role: first_frame, last_frame or reference_image.
`video_urls`	array	Optional	Default: —	Up to 10 reference videos (mp4 or mov, 2–30 s each, 30 s in total, up to 200 MB each).
`audio_urls`	array	Optional	Default: —	Up to 10 reference audio clips (wav or mp3, 2–30 s each, 30 s in total). Audio-only references are supported.
`omni_reference_task_type`	string	Optional	Default: auto	auto, reference, edit or extend. Setting edit or extend checks that task's limits when you submit.
`output_format`	string	Optional	Default: mp4	mp4 or mov. mov keeps higher color precision and is recommended for edit and extend.
`draft`	boolean	Optional	Default: —	true makes the Seedance 2.5 API generate a 480p draft that stays valid for 7 days. Cannot be combined with draft_task_id.
`draft_task_id`	string	Optional	Default: —	Task ID of a completed draft. Renders the 1080p final and inherits the draft's prompt, references, duration and seed.
`return_last_frame`	boolean	Optional	Default: false	Also return the last frame image when the task succeeds.
`seed`	integer	Optional	Default: —	Random seed. The same seed gives similar, not identical, results.
`watermark`	boolean	Optional	Default: false	Add an AI-generated watermark.
`tools`	array	Optional	Default: —	Optional tools, such as [{"type": "web_search"}] to reference web information during generation.
`nsfw_check`	boolean	Optional	Default: false	Moderate the prompt and input images with omni-moderation-latest before the task is submitted. Video and audio are not checked.

User Reviews for Seedance 2.5 API

Example experiences from creator and developer workflows using Seedance 2.5 API

“The visual quality of Seedance 2.5 is incredible! The motion is so smooth and natural, it really elevates my content.”

Sarah Kim

Content Creator

“As a developer, I appreciate the clean API and fast response times. Seedance 2.5 integrates seamlessly into our pipeline.”

Alex Wang

Full-Stack Engineer

Seedance API Model Family

Compare every Seedance video model on APIMart. One API key calls all of them; each model page shows its live pricing.

Model	Best for	Resolution	Duration
Seedance 2.5 APIThis page	Clips up to 30 s with up to 50 image, video and audio references, plus video editing and extension	480P / 720P / 1080P	4–30 s or auto
Seedance 2.0 API	Up to 4K, the highest resolution in the family, with image, video and audio references	480P / 720P / 1080P / 4K	4–15 s
Seedance 2.0 Fast API	Fast variant of Seedance 2.0 with the same image, video and audio references	480P / 720P	4–15 s
Seedance 2.0 Mini API	Mini variant of Seedance 2.0 with the same image, video and audio references	480P / 720P	4–15 s
Seedance 1.5 Pro API	Text-to-video and first/last-frame image-to-video, with optional audio	480P / 720P / 1080P	4–12 s
Seedance 1.0 Pro Quality API	Text-to-video and first/last-frame image-to-video	480P / 720P / 1080P	2–12 s
Seedance 1.0 Pro Fast API	Text-to-video and first-frame image-to-video (no last frame)	480P / 720P / 1080P	2–12 s

Seedance 2.5 API FAQ

Answers about Seedance 2.5 features, parameters, pricing, and access

What is Seedance 2.5?

Seedance 2.5 is ByteDance's audio-video foundation model from the Seed team and the successor to Seedance 2.0. The Seedance 2.5 API uses the model ID seedance-2.5 on APIMart and generates clips of up to 30 seconds at 480p, 720p or 1080p from text, image, video and audio inputs, with sound generated in the same pass. On ByteDance's Volcano Engine the same model is listed as doubao-seedance-2-5; on APIMart, call it with seedance-2.5.

What is the Seedance 2.5 release date?

ByteDance announced Seedance 2.5 at the Volcano Engine FORCE conference on June 23, 2026, and its official release date is July 31, 2026. The Seedance 2.5 API is available on APIMart today.

How do I call the Seedance 2.5 API, and where are the docs?

Send POST /v1/videos/generations with model seedance-2.5 and your prompt, then poll GET /v1/tasks/{task_id} until the status is completed and read the video URL from data.result.videos[0].url[0]. The Seedance 2.5 API example on this page has cURL and Python code, and the full Seedance 2.5 API reference is on docs.apimart.ai.

Seedance 2.5 vs Seedance 2.0: what's new?

Seedance 2.5 doubles the maximum length from 15 to 30 seconds and raises reference limits from 9 images, 3 videos and 3 audio clips to 30 images, 10 videos and 10 audio clips. It also adds audio-only references, mov output, a 480p draft mode and a watermark option. The Seedance 2.5 API on APIMart outputs up to 1080p; for 4K output, use the Seedance 2.0 API. The Seedance 2.5 API and the Seedance 2.0 API work with the same APIMart API key.

What parameters does the Seedance 2.5 API support?

In the Seedance 2.5 API, model (seedance-2.5) and prompt are required; prompt must not be sent with draft_task_id. Optional parameters are resolution (480p, 720p or 1080p), size (16:9, 4:3, 1:1, 3:4, 9:16, 21:9 or adaptive), duration (4–30 or -1), generate_audio, image_urls, image_with_roles, video_urls, audio_urls, omni_reference_task_type, output_format (mp4 or mov), draft, draft_task_id, return_last_frame, seed, watermark, tools and nsfw_check. The Seedance 2.5 API parameter table above lists defaults and limits.

How long can a Seedance 2.5 API video be, and what resolutions are supported?

The Seedance 2.5 API generates 4 to 30 seconds per request, or set duration to -1 to let the model choose; if you omit duration, the clip is 5 seconds. Seedance 2.5 API resolution is 480p, 720p (default) or 1080p. 2k and 4k are not supported.

How many references does the Seedance 2.5 API support?

Up to 50 per Seedance 2.5 API request: 30 images, 10 videos and 10 audio clips. Reference videos and reference audio can each total up to 30 seconds, and audio-only references are supported. Real human faces must be uploaded to the asset library first and referenced as asset:// IDs.

Can the Seedance 2.5 API do image to video, video edit and extend?

Yes. The Seedance 2.5 API supports text to video, image to video with reference images, first-frame and first-and-last-frame video, video editing and video extension. Edit, extend and frame tasks require size adaptive, and edits also require duration -1 with a 4–30 second source clip. In the Seedance 2.5 API, set omni_reference_task_type to edit or extend to catch these limits when you submit.

Does the Seedance 2.5 API generate video with audio?

Yes. The Seedance 2.5 API generates video and audio together, and generate_audio is true by default. Set it to false for a silent clip. You can also pass audio_urls as music or voice references.

How do I write effective Seedance 2.5 prompts?

For the Seedance 2.5 API, describe one continuous shot with the subject, action, camera movement and lighting, and refer to inputs by index, such as @图片1 for the first image or @视频1 for the first video. For edits, say what to add, remove or replace; for extensions, say to extend forward or backward. Keep edit words out of normal reference prompts, or the task may be treated as an edit.

Seedance 2.5 pricing: how much does the Seedance 2.5 API cost per second?

The Seedance 2.5 API is settled by actual token usage. The per-second rates on this page, by resolution and with or without reference video, are precharge estimates; successful tasks are reconciled against the tokens actually used, and failed tasks are fully refunded. The Seedance 2.5 API pricing table shows Gold member prices (20% off); Platinum and Diamond members save up to 28%.

Is the Seedance 2.5 API free?

No. There is no free quota for the Seedance 2.5 API on APIMart. Billing is pay-as-you-go and you only pay for successful Seedance 2.5 API requests. Members save 20%–28%: Gold members get 20% off, and Platinum and Diamond members up to 28%. See this page's live pricing table for current prices.

How do I get a Seedance 2.5 API key?

Sign up for APIMart, open the API Keys page in your dashboard and create a new key. The same key calls the Seedance 2.5 API and every other model on the platform, with pay-as-you-go billing and no subscription.

Is Seedance 2.5 the same as Dreamina Seedance 2.5?

Dreamina Seedance 2.5 is how ByteDance's Dreamina app names the Seedance 2.5 model. In Dreamina you use it inside the app; on APIMart you call it through the API with the model ID seedance-2.5. You may also see it written as Seedance2.5 or ByteDance Seedance 2.5.

Related Models

Explore more models in the same category.

View All Models →

Seedance 2.5 API FAQ

Answers about Seedance 2.5 features, parameters, pricing, and access

What is Seedance 2.5?

What is the Seedance 2.5 release date?

ByteDance announced Seedance 2.5 at the Volcano Engine FORCE conference on June 23, 2026, and its official release date is July 31, 2026. The Seedance 2.5 API is available on APIMart today.

How do I call the Seedance 2.5 API, and where are the docs?

Seedance 2.5 vs Seedance 2.0: what's new?

What parameters does the Seedance 2.5 API support?

How long can a Seedance 2.5 API video be, and what resolutions are supported?

How many references does the Seedance 2.5 API support?

Can the Seedance 2.5 API do image to video, video edit and extend?

Does the Seedance 2.5 API generate video with audio?

Yes. The Seedance 2.5 API generates video and audio together, and generate_audio is true by default. Set it to false for a silent clip. You can also pass audio_urls as music or voice references.

Seedance 2.5 API

Seedance 2.5 API Pricing

ByteDance Seedance 2.5 API for 30-Second AI Video

Key Features of the Seedance 2.5 API

What You Can Build with the Seedance 2.5 API

How to Get a Seedance 2.5 API Key and Start Building

Get Your Seedance 2.5 API Key

Test the Seedance 2.5 API in the Playground

Integrate the Seedance 2.5 API into Your App

Seedance 2.5 API Example: Text to Video and Image to Video

Authenticate Seedance 2.5 API requests

Submit a Seedance 2.5 task

Get the Seedance 2.5 result

Seedance 2.5 API Parameters

User Reviews for Seedance 2.5 API

Seedance API Model Family

Seedance 2.5 API FAQ

What is Seedance 2.5?

What is the Seedance 2.5 release date?

How do I call the Seedance 2.5 API, and where are the docs?

Seedance 2.5 vs Seedance 2.0: what's new?

What parameters does the Seedance 2.5 API support?

How long can a Seedance 2.5 API video be, and what resolutions are supported?

How many references does the Seedance 2.5 API support?

Can the Seedance 2.5 API do image to video, video edit and extend?

Does the Seedance 2.5 API generate video with audio?

How do I write effective Seedance 2.5 prompts?

Seedance 2.5 pricing: how much does the Seedance 2.5 API cost per second?

Is the Seedance 2.5 API free?

How do I get a Seedance 2.5 API key?

Is Seedance 2.5 the same as Dreamina Seedance 2.5?

Related Models

Latest Seedance 2.5 articles

Key Features of the Seedance 2.5 API

What You Can Build with the Seedance 2.5 API

How to Get a Seedance 2.5 API Key and Start Building

Get Your Seedance 2.5 API Key

Test the Seedance 2.5 API in the Playground

Integrate the Seedance 2.5 API into Your App

User Reviews for Seedance 2.5 API

Seedance 2.5 API FAQ

What is Seedance 2.5?

What is the Seedance 2.5 release date?

How do I call the Seedance 2.5 API, and where are the docs?

Seedance 2.5 vs Seedance 2.0: what's new?

What parameters does the Seedance 2.5 API support?

How long can a Seedance 2.5 API video be, and what resolutions are supported?

How many references does the Seedance 2.5 API support?

Can the Seedance 2.5 API do image to video, video edit and extend?

Does the Seedance 2.5 API generate video with audio?

How do I write effective Seedance 2.5 prompts?

Seedance 2.5 pricing: how much does the Seedance 2.5 API cost per second?

Is the Seedance 2.5 API free?

How do I get a Seedance 2.5 API key?

Is Seedance 2.5 the same as Dreamina Seedance 2.5?

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