Parameters

Name	Description	Type	Required	Enums
negativePrompt	Text describing what to avoid in the generated video.	string	No	-
prompt	Video description text guiding the animation	string	Yes	-
aspectRatio	Video aspect ratio	string	No	`16:9`, `9:16`
durationSeconds	Video duration in seconds (string type)	string	No	`4`, `6`, `8`
image	Starting frame. Accepts an image URL (e.g. `https://example.com/frame.jpg`).	string	Yes	-
lastFrame	End frame. Accepts an image URL. Optional, guides the video to end at this frame.	string	No	-
personGeneration	Person generation policy	string	No	`allow_adult`
resolution	Video resolution	string	No	`720p`, `1080p`

Pricing

Unit: $/sec

Dimension	Pricing
resolution: 720p	0.0420
resolution: 1080p	0.0672

google/veo-3.1-fast-t2v: Google Veo 3.1 Fast text-to-video model. Supports prompt, negativePrompt, aspectRatio, durationSeconds, resolution (up to 4k), and personGeneration.
google/veo-3.1-t2v: Google Veo 3.1 flagship text-to-video model. Supports prompt, negativePrompt, aspectRatio, durationSeconds, resolution (up to 4k), and personGeneration.
google/veo-3.1-fast-i2v: Google Veo 3.1 Fast image-to-video model. Supports two input modes: image mode (with optional lastFrame and negativePrompt) or referenceImages-only mode. Resolution up to 4k. See each parameter’s description for detailed constraints.
google/veo-3.1-i2v: Google Veo 3.1 flagship image-to-video model. Supports two input modes: image mode (with optional lastFrame and negativePrompt) or referenceImages-only mode. Resolution up to 4k. See each parameter’s description for detailed constraints.
google/veo-3.1-lite-t2v: Google Veo 3.1 Lite text-to-video model. Supports prompt, negativePrompt, aspectRatio, durationSeconds, resolution (up to 1080p), and personGeneration.