How much does the Veo 3.1 Fast API cost?

The default 8-second video at 720p costs 17 credits, about $0.33 at the shared USD reference. Read the live models endpoint before submitting.

Which inputs does Veo 3.1 Fast accept?

It accepts a prompt plus the listed durations, resolutions, and aspect ratios. Reference inputs are not available through this v1 endpoint.

How do I retrieve Veo 3.1 Fast output?

Poll the returned status URL until the job is ready, then download the signed output URL or URLs before they expire.

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Models · Video

Veo 3.1 Fast API

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Veo 3.1 Fast is good for generating short video shots when you need its listed duration, resolution, and framing options.

Pricing

Default example: 8-second video at 720p costs 17 credits, or $0.33 at the shared USD reference.

Resolution	Unit	Credits	USD
720p	Per 8-second video	17 cr	$0.33
1080p	Per 8-second video	17 cr	$0.33
4k	Per 8-second video	17 cr	$0.33

Accepted inputs

Kind: video
Durations: 8s
Resolutions: 720p, 1080p, 4k
Aspect ratios: 16:9, 9:16
Defaults: 8s · 720p · 16:9

Sample request

The request uses the current default settings for this model and the public GenerateMediaRequest schema.

curl -X POST "https://reviral.ai/api/v1/generate-media" \
  -H "Authorization: Bearer $REVIRAL_API_KEY" \
  -H "Idempotency-Key: first-video" \
  -H "Content-Type: application/json" \
  --data '{"model":"veo-3.1-fast-flat","prompt":"A slow camera move across a quiet lake at sunrise","durationSec":8,"resolution":"720p","aspectRatio":"16:9","maxCredits":17}'

Response and output

Accepted job

{
  "data": {
    "jobId": "550e8400-e29b-41d4-a716-446655440000",
    "kind": "video",
    "model": "veo-3.1-fast-flat",
    "creditsCharged": 17,
    "status": "queued",
    "statusUrl": "/api/v1/jobs/550e8400-e29b-41d4-a716-446655440000"
  }
}

Ready job

{
  "data": {
    "jobId": "550e8400-e29b-41d4-a716-446655440000",
    "kind": "video",
    "model": "veo-3.1-fast-flat",
    "creditsCharged": 17,
    "status": "ready",
    "statusUrl": "/api/v1/jobs/550e8400-e29b-41d4-a716-446655440000",
    "outputUrl": "https://reviral.ai/signed-output",
    "durationSec": 8
  }
}

Error cases

404 model_not_available: the ID is no longer in the live catalog.
409 price_changed: the current cost differs from maxCredits.
422 validation_error: duration, resolution, aspect ratio, size, or count is not accepted.
429 rate_limit_exceeded: wait for Retry-After before retrying.

Frequently asked questions

How much does the Veo 3.1 Fast API cost?: The default 8-second video at 720p costs 17 credits, about $0.33 at the shared USD reference. Read the live models endpoint before submitting.
Which inputs does Veo 3.1 Fast accept?: It accepts a prompt plus the listed durations, resolutions, and aspect ratios. Reference inputs are not available through this v1 endpoint.
How do I retrieve Veo 3.1 Fast output?: Poll the returned status URL until the job is ready, then download the signed output URL or URLs before they expire.

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