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Overview

seedance-2-fast is the quicker Seedance variant — same family behavior as seedance-2-pro, ~20% cheaper per second, faster turnaround. Native audio bundled. 720p output. Right for short social clips, UI motion, and rapid iteration where round-trip time beats absolute polish.

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Specs

FieldValue
Model IDseedance-2-fast
CreatorByteDance
Best forSocial shorts, UI motion, rapid iteration, product demos
Default duration5 seconds
Max duration10 seconds
Input modalitiesText, image (I2V)
Output modalitiesVideo, audio
Resolution720p
AudioBundled
Pricing modePer second

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Pricing

Cost
Per second$0.326565
Default 5s clip$1.63283

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Use this when

  • You’re iterating on prompts and need fast turnaround.
  • You’re producing many short social clips per day.
  • You can accept ~20% less polish than seedance-2-pro for the cost saving.

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Pick something else when

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Example

curl -X POST https://kymaapi.com/v1/videos/generations \
  -H "Authorization: Bearer $KYMA_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "seedance-2-fast",
    "prompt": "a phone notification slides in from the right, soft chime, clean UI background",
    "duration": 5
  }'
The endpoint is async — POST returns 202 with a job_id; poll GET /v1/jobs/{id} until status is succeeded.

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See also