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Video ByteDance · 2026-07

Seedance 2.5 API

ByteDance video up to 30 s with 30 reference images, video edit and extend

480p$0.261per second
720p$0.587per second
1080p$1.02per second

Failed generations are not charged. Prices exclude taxes. Billed from your prepaid USD balance.

Exact cost for your settings →

Examples

What Seedance 2.5 can do

Generate 30-Second Stories in One Take - complete scenes in a single generation, with smoother pacing, stable…
Edit Precisely. Keep the Frame Intact - replacing products, styles, faces, lighting, or backgrounds while preserving…
R2V prompt: Extend the video. Continue from the visuals and subjects in @Video 1 and generate another 30-second clip,…

Official examples from the model vendor: ByteDance.

Seedance 2.5 is ByteDance's July 2026 video model. It generates clips of 4-30 seconds at 480p, 720p or 1080p with generated speech, sound effects and music (mono). It takes up to 30 reference images, 10 reference clips and 10 audio tracks, and it can edit or extend a source video. Reference images and videos may contain real people. Seed control and mp4 or mov output are supported, and prompts can be up to 20,000 characters.

Best for

  • 30-second ads and explainers in a single generation
  • Keeping characters and products consistent with many references
  • Extending an existing clip or editing its content
  • Dialogue driven by a reference voice track

Prompting tips

  • For longer clips, write the prompt as a timed shot list: "0-5 s: wide shot of..., 5-12 s: close-up of...".
  • Frame roles, edit and extend force the adaptive ratio, so crop afterwards if you need a fixed format.
  • Reference clips can be 2-30 s each with 30 s combined, and they are billed on top of the output.
  • Audio can be the only reference; use it to set a voice or a beat.

FAQ

How much does the Seedance 2.5 API cost?

Seedance 2.5 is billed at from $0.261 per second. Reference clips add to the cost, the total appears as estimated_cost before the job runs, and failed generations are not charged.

How long can a Seedance 2.5 video be?

From 4 up to 30 seconds. With duration: -1 the model picks the length, and the estimate assumes 30 seconds.

Can Seedance 2.5 use photos of real people?

Yes, reference images and videos may contain real people. You need the rights and consent to use them, and outputs are yours as far as the law and ByteDance's terms allow.

How to call Seedance 2.5 via API

curl https://jantaris.com/v1/generate?wait=60 \
  -H "Authorization: Bearer $JANTARIS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "seedance-2.5",
  "input": {
    "prompt": "A slow dolly shot through a neon-lit night market in the rain, reflections on wet asphalt, cinematic",
    "aspect_ratio": "adaptive",
    "resolution": "720p",
    "duration": 5
  }
}'

Parameters

ParameterTypeAllowedDefault
prompt *string≤ 20000 chars
aspect_ratiostring16:9 9:16 1:1 4:3 3:4 21:9 adaptiveadaptive
resolutionstring480p 720p 1080p720p
durationinteger4-305
generate_audiobooleantrue
image_urlstring
end_image_urlstring
image_urlsarraymax 30
video_urlsarraymax 10
audio_urlsarraymax 10
seedinteger

The same schema is available from GET /v1/models/seedance-2.5.