Skip to main content
veo3.1 is Google’s Veo 3.1 model. Same two-phase task-based protocol as the other video models, with one differentiator worth knowing about: native audio generation alongside the video track. The same submit → poll flow produces an MP4 with an audio layer the model invented to match the scene — useful for one-shot deliverables that won’t get a separate sound-design pass. Pricing: $0.40 / second of generated footage — see the rate card. Failures don’t bill; per-second pricing applies to generated footage length, and audio doesn’t add a separate line item on this tier.

​
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, result_url, and audio_url when ready

​
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",
    "prompt": "Rain falling on a quiet street at night, distant car passing",
    "duration_seconds": 5,
    "size": "1280x720",
    "audio": true
  }' | jq -r .task_id)

# Poll pattern matches sora2 — see /models/sora2#quickstart
# Response includes both result_url (video) and audio_url (audio track)

​
Capabilities

CapabilitySupported
Text-to-video✅
Image-to-video (with source_image)✅
Native audio generation✅ (set audio: true)
duration_seconds 5 / 10✅
size 1280×720 / 1920×1080✅
Modalityvideo
Capability bucketvideo_generate

​
When to use

  • One-shot deliverable — clip is the final output, no sound-design pass coming.
  • Ambient / atmospheric footage — rain, wind, city noise, where Veo’s native audio is more authentic than dubbing-over-silent footage.
  • Alternative to Sora — when Sora’s particular motion style isn’t the right fit and Google’s render feels closer to brand.
When not to use:
  • You already have your own sound design — audio is a small premium that’s wasted in that flow; drop to veo3.1-fast without audio.
  • Sora-specific motion characteristics — go to sora2 or sora2-pro.

​
Next