Veo 3.1 Fast

Google Veo 3.1 Fast – balanced speed and quality. Reference images for style/character continuity, optional voice narration.

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Videogoogle/veo-3.1-fastSee pricingFeatured

Base URL

https://api.zekron.tech/api/v1

Supported modes

text-to-videoimage-to-videoreference-to-video

Parameters

Pass these inside the input object when creating a task.

Field	Required
prompt	required
aspect_ratio	optional
duration	optional
image_url	optional
end_image_url	optional
reference_urls	optional
generate_audio	optional
seed	optional

promptrequired

aspect_ratiooptional

durationoptional

image_urloptional

end_image_urloptional

reference_urlsoptional

generate_audiooptional

seedoptional

Example request

bash

curl -X POST https://api.zekron.tech/api/v1/tasks \
  -H "Authorization: Bearer zk_live_xxx" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "google/veo-3.1-fast",
  "input": {
    "prompt": "a cinematic shot of a lighthouse at golden hour",
    "duration": 5,
    "aspect_ratio": "16:9",
    "generate_audio": true,
    "seed": 42
  }
}'

Example response

json

{
  "id": "zk_task_8f3a2b1c9d",
  "model": "google/veo-3.1-fast",
  "status": "processing",
  "created_at": "2026-06-10T12:00:00Z"
}

Poll GET https://api.zekron.tech/api/v1/tasks/{id} until status is success or failed.

Pricing

This model is billed at See pricing. You are only charged for successful generations — failed tasks are never billed. Generated outputs are retained for 30 days before they expire.