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seedance2-fast is the lightest tier in the Seedance 2 family. The trade-off vs seedance2: noticeably lower fidelity on hard motion / complex subjects, materially lower per-second cost, and faster wall-clock to first frame. The right call for high-volume programmatic video work where good-enough beats expensive — social cards, A/B variants, internal-facing creative. Pricing: $0.05 / second of generated footage — see the rate card. Failures don’t bill.

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Protocols

ProtocolPathPurpose
OpenAI Video — submitPOST https://llm.bytespike.ai/v1/videos/generationsenqueues; returns task_id
OpenAI Video — pollGET https://llm.bytespike.ai/v1/videos/tasks/{task_id}returns status and result_url

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Quickstart

TASK_ID=$(curl -s https://llm.bytespike.ai/v1/videos/generations \
  -H "Authorization: Bearer $BYTESPIKE_API_KEY" \
  -H "content-type: application/json" \
  -d '{
    "model": "seedance2-fast",
    "prompt": "Quick demo loop: a cup of tea steaming, top-down, 3 seconds",
    "duration_seconds": 3,
    "size": "1280x720"
  }' | jq -r .task_id)

# Poll pattern — see /models/sora2#quickstart

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Capabilities

CapabilitySupported
Text-to-video✅
Image-to-video (with source_image)✅ basic
duration_seconds 3 / 5✅
size 1280×720✅
Modalityvideo
Capability bucketvideo_generate

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When to use

  • Volume programmatic video — social cards, A/B variants, demo loops.
  • Fastest Seedance tier — fastest wall-clock in the Seedance family for the quickest “click → see clip” loop.
  • Internal-facing creative — design review mockups, pitch decks, anywhere “good enough” beats “expensive flagship”.
When not to use:

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