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Video ByteDance · 2026-07

Seedance 2.5 Eco API

Economy Seedance 2.5: 4-30 s clips at 720p or 1080p with edit and extend

720p$0.44per second
1080p$0.762per second

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

Exact cost for your settings →

Seedance 2.5 Eco is the economy tier of ByteDance's Seedance 2.5, with the same request body and modes. It produces 4-30 second clips at 720p or 1080p, accepts the same large reference set (up to 30 images, 10 clips and 10 audio tracks), and supports video editing and extension. Picture quality may be below the standard variant, and generation typically takes 50-100 seconds longer. It fits long-form batch work where cost matters more than turnaround time.

Best for

  • Batches of 30-second product videos
  • Extending existing footage in background jobs
  • Content pipelines that publish on a schedule
  • Iterating on long prompts before a final standard render

Prompting tips

  • Send a webhook_url and let the result come to you instead of polling.
  • For edits of a source clip, send duration: -1 so the output length follows the source.
  • Phrase edits as instructions: "replace the red car with a blue bicycle, keep the camera motion".
  • Keep reference media within limits: each clip 2-30 s, 30 s combined, 200 MB per file.

FAQ

What does Seedance 2.5 Eco cost?

It costs from $0.44 per second. Reference clips are billed on top of the output, and a failed generation costs nothing.

What is the difference between Seedance 2.5 and Seedance 2.5 Eco?

The inputs and modes are the same. Eco drops 480p, may deliver lower picture quality and usually takes 50-100 s longer; Seedance 2.5 is the standard tier.

Can Seedance 2.5 Eco extend a video?

Yes. It supports both video extension and video editing, like the standard model.

How to call Seedance 2.5 Eco 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-eco",
  "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
resolutionstring720p 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-eco.