The Seedance 1.5 Pro API on APIMart runs ByteDance Seedance 1.5 Pro, a video model that generates sound together with the picture. Create 4–12 second clips from text or from first and last frame images at 480p, 720p or 1080p.
Native AudioText to VideoImage to VideoUp to 1080p
Transparent pricing with no hidden fees. Pay only for what you use.
Variant
Tier
GoldCurrent price
Platinum
Diamond
Official
Your savings
seedance-1-5-pro
480P
0.204Credits(~$0.0204)/sec
0.1938Credits(~$0.0194)/sec
0.1836Credits(~$0.0184)/sec
0.255Credits(~$0.0255)/sec
20%
720P
0.44Credits(~$0.044)/sec
0.418Credits(~$0.0418)/sec
0.396Credits(~$0.0396)/sec
0.55Credits(~$0.055)/sec
20%
1080P
1.08Credits(~$0.108)/sec
1.026Credits(~$0.1026)/sec
0.972Credits(~$0.0972)/sec
1.35Credits(~$0.135)/sec
20%
* Actual costs are subject to final output.
ByteDance Seedance 1.5 Pro API: AI Video with Native Audio
The Seedance 1.5 Pro API brings ByteDance's AI video generator with native audio to APIMart. Generate 4–12 second clips with synchronized sound from text prompts or from first and last frame images, at up to 1080p.
Seedance 1.5 Pro API Example: Text to Video and Image to Video
Call ByteDance Seedance 1.5 Pro on APIMart with one POST request. Generation is asynchronous: submit a task, then poll the task endpoint for the video.
1
Authenticate Seedance 1.5 Pro 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 1.5 Pro API request.
2
Submit a Seedance 1.5 Pro task
POST /v1/videos/generations with model seedance-1-5-pro, your prompt, aspect_ratio, resolution and duration. Add image_urls for image to video. The response contains the task ID in data[0].task_id.
3
Get the Seedance 1.5 Pro result
Poll GET /v1/tasks/{task_id} until status is completed, then read the generated video from data.result.videos. If the task fails, the reason is returned in data.error.message.
curl -X POST https://api.apimart.ai/v1/videos/generations \
-H "Authorization: Bearer $APIMART_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedance-1-5-pro",
"prompt": "A cinematic tracking shot of a red vintage car driving along a coastal road at sunset, waves crashing below, warm golden light",
"aspect_ratio": "16:9",
"resolution": "720p",
"duration": 5
}'
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-1-5-pro",
"prompt": "A cinematic tracking shot of a red vintage car driving along a coastal road at sunset, waves crashing below, warm golden light",
"aspect_ratio": "16:9",
"resolution": "720p",
"duration": 5
}
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 $APIMART_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedance-1-5-pro",
"prompt": "The woman in the photo turns toward the camera and smiles as the wind moves her hair, soft daylight, gentle ambient sound",
"image_urls": [
"https://example.com/portrait.jpg"
],
"resolution": "720p",
"duration": 5
}'
TASK_ID="task_xxx" # replace with the task_id returned by the POST request
curl "https://api.apimart.ai/v1/tasks/$TASK_ID" \
-H "Authorization: Bearer $APIMART_API_KEY"
Seedance 1.5 Pro API Parameters
Parameter
Type
Required
Default
Description
model
string
Required
Default: seedance-1-5-pro
Use seedance-1-5-pro.
prompt
string
Required
Default: —
Seedance 1.5 Pro API video description. Describe the scene, action and style in detail.
duration
integer
Optional
Default: 5
Seedance 1.5 Pro API clip length from 4 to 12 seconds.
aspect_ratio
string
Optional
Default: 16:9
16:9, 9:16, 1:1, 4:3, 3:4 or 21:9.
resolution
string
Optional
Default: 720p
480p, 720p or 1080p.
seed
integer
Optional
Default: —
Random seed from -1 to 2^32-1. Reuse a seed with the same request to get similar results.
audio
boolean
Optional
Default: true
Generate synchronized audio with the video. Set false for a silent clip.
camerafixed
boolean
Optional
Default: false
Keep the camera fixed during the shot.
image_urls
array
Optional
Default: —
Image URLs for image to video: 1 image is used as the first frame, 2 images as the first and last frames. Cannot be combined with image_with_roles.
image_with_roles
array
Optional
Default: —
Images with a role: first_frame or last_frame, one image per role.
nsfw_check
boolean
Optional
Default: false
Check the prompt and images before submission.
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.
What ByteDance Seedance 1.5 Pro can do through one APIMart endpoint
Native Audio Generation in the Seedance 1.5 Pro API
audio is on by default, so the Seedance 1.5 Pro API returns video and synchronized sound in one file. Set audio to false when you need a silent clip.
Seedance 1.5 Pro Text to Video API
Describe the scene, action and style, and the Seedance 1.5 Pro API returns a 4–12 second clip. Detailed prompts give better results.
First and Last Frame Control in Seedance 1.5 Pro
Send one image in image_urls as the first frame, or two images as the first and last frames, to control how the shot starts and ends.
Fixed Camera Shots with the Seedance 1.5 Pro Model
Set camerafixed to true to keep the camera still, which suits product shots and talking scenes.
1080p Output from BytePlus Seedance 1.5 Pro
Choose 480p, 720p or 1080p; the Seedance 1.5 Pro API defaults to 720p.
Six Aspect Ratios in the Seedance 1.5 Pro API
Render in 16:9, 9:16, 1:1, 4:3, 3:4 or 21:9 at every resolution, from vertical social clips to widescreen scenes.
4–12 Second Clips with Seedance 1.5
Set duration from 4 to 12 seconds; the default is 5 seconds.
Reproducible Results with Seedance 1.5 Pro Seeds
Pass a seed to keep results consistent while you adjust prompts and settings.
What You Can Build with the Seedance 1.5 Pro API
Video projects that benefit from picture and sound generated together
Video Ads with Sound from Seedance 1.5 Pro
Create short ads where visuals and sound arrive in one generation, ready for social placements.
E-commerce Product Videos with the Seedance 1.5 Pro API
Animate product photos from a first frame and finish on a chosen last frame for consistent catalog clips.
Film Previs with ByteDance Seedance 1.5 Pro
Turn storyboard frames into moving previews with ambient sound to check timing and atmosphere.
Social Video Clips with the Seedance 1.5 Pro Model
Produce vertical 9:16 clips with sound for TikTok, Reels and YouTube Shorts.
Character Scenes with Seedance 1.5
Keep a character's look from the first frame through the shot while the model adds matching sound.
Education & Training
Create short explainer clips that combine visuals and sound in one generation.
How to Get a Seedance 1.5 Pro API Key and Start Building
1
Sign Up & Top Up Balance
Sign up for a free APIMart account to start your Seedance AI video creation journey. Top up as needed, flexible payment, no hidden fees for using Seedance.
→
2
Get Your Seedance 1.5 Pro API Key
Create an API key in your dashboard and use seedance-1-5-pro as the model in your requests.
→
3
Call the Seedance 1.5 Pro API
Try prompts and frames in the playground on this page, then send requests from your backend and poll the task for the result.
User Reviews
“The motion consistency of Seedance is incredible, completely gone is the 'AI feel' jitter of the past, character movements is very natural.”
Li Ming
Senior Motion Designer
“The improvement in image quality of Seedance 1.5 Pro is very obvious, especially lighting processing, holding up well even on large screens.”
Sarah Jones
Commercial Director
“The Seedance upgrade was very smooth, just had to change the model parameter to use the new model, and the results improved significantly. Great!”
Wang Wei
Full Stack Engineer
“The Seedance Image-to-Video feature is too powerful, perfectly animating my illustrations without breaking them. This is the tool I've always wanted.”
Yuki Tanaka
Illustrator
“Seedance 1.5 Pro generation speed is faster than I imagined. For us self-media creators who need to produce quickly, efficiency is life.”
Emily Chen
Content Creator
“The Seedance model understands complex instructions very well. Many scenes that used to require repeated rerolls now succeed in one go.”
Robert Miller
AI Artist
Seedance 1.5 Pro API FAQ
Answers about Seedance 1.5 Pro API capabilities, parameters and access
What is Seedance 1.5 Pro?
Seedance 1.5 Pro is ByteDance Seed's audio-video generation model and the successor to Seedance 1.0 Pro in the Seedance Pro line. It is listed as BytePlus Seedance 1.5 Pro on BytePlus ModelArk, offered as Dreamina Seedance 1.5 Pro in Dreamina, and also written as Seedance V1.5 Pro. It generates video and synchronized sound together. On APIMart, the Seedance 1.5 Pro API uses the model ID seedance-1-5-pro.
When was Seedance 1.5 Pro released?
ByteDance released Seedance 1.5 Pro in December 2025; the Seed team published its technical report on December 15, 2025. You can call it on APIMart with the model ID seedance-1-5-pro.
What's new in Seedance 1.5 Pro compared to Seedance 1.0 Pro?
Seedance 1.5 Pro adds native audio generation, which Seedance 1.0 Pro does not offer. It also accepts first and last frames through image_urls and a camerafixed option. Clips run 4–12 seconds with 720p as the default, while Seedance 1.0 Pro runs 2–12 seconds with 1080p as the default.
How do I use the Seedance 1.5 Pro API?
Send POST /v1/videos/generations with model seedance-1-5-pro and your prompt. The Seedance 1.5 Pro API runs as an asynchronous task: read the task ID from data[0].task_id, poll GET /v1/tasks/{task_id} until the status is completed, then read the video from data.result.videos. The example on this page shows the flow in cURL and Python.
What parameters does the Seedance 1.5 Pro API support?
In the Seedance 1.5 Pro API, model and prompt are required. Optional parameters are duration (4–12 seconds, default 5), aspect_ratio (default 16:9), resolution (480p, 720p or 1080p, default 720p), seed, audio (default true), camerafixed (default false), image_urls, image_with_roles and nsfw_check.
Does Seedance 1.5 Pro support image to video and first and last frames?
Yes. Put one image in image_urls to use it as the first frame, or two images to set the first and last frames. You can also use image_with_roles with first_frame and last_frame, but not together with image_urls.
Does the Seedance 1.5 Pro API generate audio?
Yes. The audio parameter is true by default, so the Seedance 1.5 Pro API returns video with synchronized sound. Set audio to false for a silent clip.
What video resolutions and aspect ratios does Seedance 1.5 Pro support?
Seedance 1.5 Pro outputs 480p, 720p or 1080p, with 720p as the default, in six aspect ratios: 16:9, 9:16, 1:1, 4:3, 3:4 and 21:9. Every ratio is available at every resolution, and clips run 4–12 seconds.
Can Seedance 1.5 Pro be used for commercial projects?
Yes, you own full commercial rights to the content generated by Seedance.
How much does the Seedance 1.5 Pro API cost?
The ByteDance Seedance 1.5 Pro API is billed per second of generated video. The pricing table on this page lists every specification, and the prices shown are Gold member rates (20% off). Platinum and Diamond members save even more, up to 28%, and you only pay for successful requests.
How do I get a Seedance 1.5 Pro API key?
Sign up for APIMart, open the API Keys page in your dashboard, and create a key. The same key works for the ByteDance Seedance 1.5 Pro API and every other model on the platform, with pay-as-you-go billing and no subscription.
Is the Seedance 1.5 Pro API free?
There is no free tier. The Seedance 1.5 Pro API is pay-as-you-go: you only pay for successful requests, and every price is 20% off.
