Veo 3.1 Fast

Model ID

Use with the Workers AI binding, the AI Gateway REST API, or the Unified API.

Calling the provider directly? Use the provider's model name instead, including with provider-native endpoints or the provider's own SDK. For example, Anthropic's name for anthropic/claude-opus-4.8 is claude-opus-4-8.

Third-party
Zero data retention

A faster version of Veo 3.1 optimized for lower latency while maintaining high-quality video and audio output.

Model Info
Terms and License	link ↗
More information	link ↗
Zero data retention	Yes
Pricing	Default (per second)$0.08 @720p (per second)$0.08 @1080p (per second)$0.10 @4k (per second)$0.25 @720p w/ audio (per second)$0.10 @1080p w/ audio (per second)$0.12 @4k w/ audio (per second)$0.30

Usage

const response = await env.AI.run(
  'google/veo-3.1-fast',
  {
    prompt: 'A butterfly landing on a colorful flower in a garden',
    aspect_ratio: '16:9',
    duration: '6s',
    generate_audio: true,
    resolution: '720p',
  },
)
console.log(response)

curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "google/veo-3.1-fast",
  "input": {
    "prompt": "A butterfly landing on a colorful flower in a garden",
    "aspect_ratio": "16:9",
    "duration": "6s",
    "generate_audio": true,
    "resolution": "720p"
  }
}'

{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "video": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/google__veo-3.1-fast/quick-demo.mp4"
  },
  "state": "Completed"
}

Examples

Social Content — Quick vertical video for social media

const response = await env.AI.run(
  'google/veo-3.1-fast',
  {
    prompt: 'Aesthetic morning routine: sun rays through curtains, coffee being poured',
    aspect_ratio: '9:16',
    duration: '6s',
    generate_audio: true,
    resolution: '720p',
  },
)
console.log(response)

curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "google/veo-3.1-fast",
  "input": {
    "prompt": "Aesthetic morning routine: sun rays through curtains, coffee being poured",
    "aspect_ratio": "9:16",
    "duration": "6s",
    "generate_audio": true,
    "resolution": "720p"
  }
}'

{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "video": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/google__veo-3.1-fast/social-content.mp4"
  },
  "state": "Completed"
}

Motion Graphics — Quick animated graphics

const response = await env.AI.run(
  'google/veo-3.1-fast',
  {
    prompt: 'Glowing neon lines forming geometric patterns on a dark background',
    aspect_ratio: '16:9',
    duration: '4s',
    generate_audio: false,
    resolution: '720p',
  },
)
console.log(response)

curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "google/veo-3.1-fast",
  "input": {
    "prompt": "Glowing neon lines forming geometric patterns on a dark background",
    "aspect_ratio": "16:9",
    "duration": "4s",
    "generate_audio": false,
    "resolution": "720p"
  }
}'

{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "video": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/google__veo-3.1-fast/motion-graphics.mp4"
  },
  "state": "Completed"
}

Ambient Scene — Relaxing background video

const response = await env.AI.run(
  'google/veo-3.1-fast',
  {
    prompt: 'Rain falling on a window with a blurred city skyline in the background at night',
    aspect_ratio: '16:9',
    duration: '8s',
    generate_audio: true,
    resolution: '720p',
  },
)
console.log(response)

curl https://api.cloudflare.com/client/v4/accounts/$CLOUDFLARE_ACCOUNT_ID/ai/run \
  --header "Authorization: Bearer $CLOUDFLARE_API_TOKEN" \
  --header "Content-Type: application/json" \
  --data '{
  "model": "google/veo-3.1-fast",
  "input": {
    "prompt": "Rain falling on a window with a blurred city skyline in the background at night",
    "aspect_ratio": "16:9",
    "duration": "8s",
    "generate_audio": true,
    "resolution": "720p"
  }
}'

{
  "gatewayMetadata": {
    "keySource": "Unified"
  },
  "result": {
    "video": "https://pub-04a6d208d361438ea01b797e6973bd19.r2.dev/catalog/google__veo-3.1-fast/ambient-scene.mp4"
  },
  "state": "Completed"
}

Parameters

prompt

stringrequiredText prompt describing the video to generate

image_input

stringBase64-encoded reference image for i2v

duration

stringrequireddefault: 6senum: 4s, 6s, 8sVideo duration

aspect_ratio

stringrequireddefault: 16:9enum: 16:9, 9:16, 1:1Video aspect ratio

resolution

stringrequireddefault: 720penum: 720p, 1080pVideo resolution

generate_audio

booleanrequireddefault: trueWhether to generate audio with the video

video

stringformat: uriURL to the generated video

API Schemas (Raw)

Input

Output