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Video ByteDance · 2026-02

Seedance 2.0 Fast API

Faster, cheaper Seedance 2.0 for 480p and 720p clips with generated audio

480p$0.116per second
720p$0.247per second

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

Exact cost for your settings →

Seedance 2.0 Fast is the faster, lower-cost variant of ByteDance's Seedance 2.0, released in February 2026 with the same request shape. It caps output at 480p and 720p and generates 4-15 second clips with optional generated audio. You can start from text, images, a first and last frame, or reference clips and audio, exactly as with the full model. The trade-offs are no 1080p or 4K and no automatic duration. It is the practical choice for drafts, previews and high-volume social content.

Best for

  • Previsualizing a shot before rendering it on the full model
  • Vertical social clips at 720p
  • High-volume ad variations
  • Testing prompts and references at lower cost

Prompting tips

  • The request matches Seedance 2.0, so a draft that works can be re-rendered at higher resolution by changing only the model id.
  • Set duration explicitly between 4 and 15; -1 is not available on Fast.
  • The default ratio is 16:9 here, so set 9:16 for Reels and TikTok.
  • Turn generate_audio off when you plan to add your own soundtrack.

FAQ

How much does Seedance 2.0 Fast cost?

The rate is from $0.116 per second. Jantaris shows estimated_cost before the job runs and does not charge failed generations.

What resolution does Seedance 2.0 Fast support?

480p and 720p. For 1080p or 4K, use Seedance 2.0.

Does Seedance 2.0 Fast generate sound?

Yes. Audio generation is on by default and can be switched off with generate_audio: false.

How to call Seedance 2.0 Fast via API

curl https://jantaris.com/v1/generate?wait=60 \
  -H "Authorization: Bearer $JANTARIS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "seedance-2.0-fast",
  "input": {
    "prompt": "A slow dolly shot through a neon-lit night market in the rain, reflections on wet asphalt, cinematic",
    "aspect_ratio": "16:9",
    "resolution": "720p",
    "duration": 5
  }
}'

Parameters

ParameterTypeAllowedDefault
prompt *string≤ 20000 chars
aspect_ratiostring16:9 9:16 1:1 4:3 3:4 21:9 adaptive16:9
resolutionstring480p 720p720p
durationinteger4-155
generate_audiobooleantrue
image_urlstring
end_image_urlstring
image_urlsarraymax 9
video_urlsarraymax 3
audio_urlsarraymax 3

The same schema is available from GET /v1/models/seedance-2.0-fast.