lightricks/ltx-2-fast

Ideal for rapid ideation and mobile workflows. Perfect for creators who need instant feedback, real-time previews, or high-throughput content.

Capabilities

Reference Images

Community model (estimated from hardware time)

Name	Type	Description	Default	Constraints
`prompt` *	string	Text prompt describing the video to generate	`—`	—
`duration`	integer	Duration of the video in seconds. Durations longer than 10 seconds are only available with 1080p resolution.	`6`	6 8 10 12 14 16 18 20
`generate_audio`	boolean	Generate audio for the video. Used for text_to_video and image_to_video tasks.	`true`	—
`image`	string (uri)	First frame image for image-to-video generation	`—`	—
`resolution`	string	Resolution quality of the generated video	`"1080p"`	1080p 2k 4k

prompt required string

Text prompt describing the video to generate

duration integer

Duration of the video in seconds. Durations longer than 10 seconds are only available with 1080p resolution.

Default: 6

6 8 10 12 14 16 18 20

generate_audio boolean

Generate audio for the video. Used for text_to_video and image_to_video tasks.

Default: true

image string

First frame image for image-to-video generation

resolution string

Resolution quality of the generated video

Default: "1080p"

1080p 2k 4k

Version: 648be07d527d Updated: 6/26/2026 80.4K runs