GoogleMediumHigh

Google Veo 3.1 Lite

Google's cost-efficient Veo 3.1 variant for high-volume video generation — text-to-video, image-to-video and first/last-frame interpolation at 720p or 1080p, 4/6/8 seconds, with natively synchronized audio on every clip.

930 credits

per 8s 720p video — billed per second (720p 116/s, 1080p 186/s; audio included). 1080p requires 8s (1490)

Native synchronized audio on every clip — dialogue, sound effects and ambience

Text-to-video and image-to-video

First/last-frame interpolation for smooth transitions

720p or 1080p, 16:9 or 9:16, 4/6/8 second clips

Lowest per-second price in the Veo 3.1 family

Run it right now

Test this model instantly in the Console Playground — no code required

Use with AI Assistant

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llms.txtllms.txt ↗

Quick Start

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "google/veo-3.1-lite",
  "input": {
    "prompt": "A close-up of two old friends reuniting at a train station. The woman gasps, 'I can't believe it's really you!' and they embrace tightly. The sound of a train whistle echoes in the background, ambient station noise, emotional orchestral music swells gently.",
    "duration": 8,
    "resolution": "720p",
    "aspect_ratio": "16:9"
  }
}'

Parameters

Parameter	Type	Required	Default	Description
`prompt`	string	Yes	-	Text prompt for video generation. Put dialogue in quotes and describe sound effects and ambience for richer audio
`image`	string	No	-	Input image to animate into a video. Ideal images are 16:9 or 9:16 and 1280x720 or 720x1280
`last_frame`	string	No	-	Ending image for interpolation. When provided with an input image, creates a smooth transition between the two images
`aspect_ratio`	string	No	16:9	Video aspect ratio 16:99:16
`duration`	integer	No	8	Video duration in seconds. Must be 8 when using 1080p resolution 468
`resolution`	string	No	720p	Resolution of the generated video. 4k is not supported for Veo 3.1 Lite 720p1080p
`seed`	integer	No	-	Random seed. Doesn't guarantee determinism but slightly improves it

How to Provide File Input

There are 3 ways to provide files for the imagelast_frame parameters:

Recommended

Image URL

Pass a publicly accessible URL directly. With the Storage API (POST /v1/files/upload-url) the file uploads straight to S3 (50MB per file) and you pass the returned file_url.

{
  "model": "google/veo-3.1-lite",
  "input": {
    "prompt": "your prompt here",
    "image": "https://example.com/image.jpg"
  }
}

Direct Upload (Multipart)

Attach files directly to POST /v1/predictions/upload. No separate upload step, but the bytes pass through the API server so the whole request is capped at 10MB.

curl -X POST "https://api.core.today/v1/predictions/upload" \
  -H "X-API-Key: cdt_your_api_key" \
  -F "model=google/veo-3.1-lite" \
  -F 'input={"prompt":"your prompt here"}' \
  -F "file:image=@your_file.png"

See the File Upload docs for more upload methods including Presigned URLs.

Common Parameters

Common parameters used when calling POST /v1/predictions.

Parameter	Type	Required	Default	Description
`model`	string	Yes	-	Model identifier
`input`	object	Yes	-	Object containing the model-specific parameters from the table above
`output_folder`	string	No	-	Folder path for output files (max 256 chars, '..' not allowed)
`webhook_url`	string	No	-	Webhook URL to call on completion
`is_public`	boolean	No	false	If true, output files are also available via permanent public URLs

Examples

Dialogue Scene with Audio

An 8-second 720p clip with spoken dialogue and ambient sound — 930 credits

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "google/veo-3.1-lite",
  "input": {
    "prompt": "A close-up of two old friends reuniting at a train station. The woman gasps, 'I can't believe it's really you!' and they embrace tightly. The sound of a train whistle echoes in the background, ambient station noise, emotional orchestral music swells gently.",
    "duration": 8,
    "resolution": "720p",
    "aspect_ratio": "16:9"
  }
}'

Short Image-to-Video

A 4-second 720p animation of a still image — 4s at 116/s

curl -X POST "https://api.core.today/v1/predictions" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: cdt_your_api_key" \
  -d '{
  "model": "google/veo-3.1-lite",
  "input": {
    "prompt": "Animate this scene with gentle camera movement and ambient sounds",
    "image": "https://example.com/your-image.jpg",
    "duration": 4,
    "resolution": "720p"
  }
}'