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veo3.1-fast is the Fast tier of veo3.1. Trade-offs: drops the native audio option, slightly looser fidelity on hard motion, and meaningfully lower per-second cost. The right default for programmatic / volume video work where Sora-grade quality isn’t the bar. Pricing: 0.20/secondofgeneratedfootage—seethe[ratecard](/pricing).Failuresdon′tbill.FortheverycheapestVeotier,‘veo3.1−lite‘runsat0.20 / second of generated footage — see the [rate card](/pricing). Failures don't bill. For the very cheapest Veo tier, `veo3.1-lite` runs at 0.05 / second.

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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": "veo3.1-fast",
    "prompt": "A coffee cup steaming on a kitchen counter, morning light",
    "duration_seconds": 5,
    "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)✅
Audio generation— (use veo3.1 for audio)
duration_seconds 5 / 10✅
size 1280×720✅
Modalityvideo
Capability bucketvideo_generate

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When to use

  • Volume / programmatic video — short social-card clips, A/B variants, demo placeholders.
  • No audio needed — explainer-style clips that will be dubbed or scored separately.
  • Internal-facing creative — quick visualizations for design review.
When not to use:
  • Audio matters in the deliverable — go to veo3.1.
  • Hero / final marketing creative — sora2 or sora2-pro.

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