Creative studioGeneratedModels
Veo 3.1 Fast
Creative Studio video model reference for the public API.
Veo 3.1 Fast
Public model ID: veo-31-fast
Asset type: video
Category: Video Generation
Starting credits: 8 (defaults: 12)
Prompt required.
Start a generation
curl -s -X POST "$API_BASE_URL/v1/creative-studio/generations" \
-H "Authorization: Bearer vsl_YOUR_KEY" \
-H "Content-Type: application/json" \
-d '{
"modelId": "veo-31-fast",
"prompt": "Your prompt here",
"image": ["https://example.com/reference.jpg"],
"aspect_ratio": "16:9"
}' | jqPoll GET /v1/creative-studio/generations/{id} until status is completed. Completed generations return outputUrl on cdn.videoslash.com.
Media parameters
| Name | Type | Constraints | Default | Description |
|---|---|---|---|---|
image | string | optional · max items: 1 | — | Input image to start generating from. Ideal images are 16:9 or 9:16 and 1280x720 or 720x1280, depending on the aspect ratio you choose. |
last_frame | string | optional · max items: 1 | — | Ending image for interpolation. When provided with an input image, creates a transition between the two images. |
Settings parameters
| Name | Type | Constraints | Default | Description |
|---|---|---|---|---|
aspect_ratio | enum | optional · enum: 16:9, 9:16 | 16:9 | Video aspect ratio |
duration | enum | optional · enum: 4, 6, 8 | 8 | Video duration in seconds |
negative_prompt | string | optional | — | Description of what to exclude from the generated video |
resolution | enum | optional · enum: 720p, 1080p | 1080p | Resolution of the generated video |
generate_audio | boolean | optional | true | Generate audio with the video |
seed | integer | optional | — | Random seed. Omit for random generations |