google/veo-3.1-fast

New and improved version of Veo 3 Fast, with higher-fidelity video, context-aware audio and last frame support

Capabilities

Reference ImagesNegative PromptSeed

Community model (estimated from hardware time)

Name	Type	Description	Default	Constraints
`prompt`*	string	Text prompt for video generation	`—`	—
`aspect_ratio`	string	Video aspect ratio	`"16:9"`	16:99:16
`duration`	integer	Video duration in seconds	`8`	468
`generate_audio`	boolean	Generate audio with the video	`true`	—
`image`	string(uri)	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(uri)	Ending image for interpolation. When provided with an input image, creates a transition between the two images.	`—`	—
`negative_prompt`	string	Description of what to exclude from the generated video	`—`	—
`resolution`	string	Resolution of the generated video	`"1080p"`	720p1080p
`seed`	integer	Random seed. Omit for random generations	`—`	—

promptrequiredstring

Text prompt for video generation

aspect_ratiostring

Video aspect ratio

Default: "16:9"

16:99:16

durationinteger

Video duration in seconds

Default: 8

468

generate_audioboolean

Generate audio with the video

Default: true

imagestring

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_framestring

Ending image for interpolation. When provided with an input image, creates a transition between the two images.

negative_promptstring

Description of what to exclude from the generated video

resolutionstring

Resolution of the generated video

Default: "1080p"

720p1080p

seedinteger

Random seed. Omit for random generations

Version: ba987aceebefUpdated: 8/12/2026670.7K runs