runwayml/aleph-2

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Edit one frame to update an entire video. Aleph 2.0 is Runway's in-context video editor: longer clips (up to 30s), multi-shot edits, and image-level precision via keyframe references.

Capabilities

Seed

Cost

Community model (estimated from hardware time)

Input Parameters

Name	Type	Description	Default	Constraints
`prompt` *	string	Text prompt describing the edit to be applied to the input video.	`—`	—
`video` *	string (uri)	Input video to edit. Videos must be between 2 and 30 seconds and less than 16MB.	`—`	—
`keyframe_images`	array	Up to 5 optional keyframe images used as more precise control over edits. The position of each keyframe is given by keyframe_positions.		—
`keyframe_positions`	array	Position of each keyframe in keyframe_images. One entry per image. Each value must be 'first', 'last', or a timestamp in seconds (e.g. '1.67').		—
`seed`	integer	Random seed. Set for reproducible generation	`—`	—

prompt required string

Text prompt describing the edit to be applied to the input video.

video required string

Input video to edit. Videos must be between 2 and 30 seconds and less than 16MB.

keyframe_images array

Up to 5 optional keyframe images used as more precise control over edits. The position of each keyframe is given by keyframe_positions.

Default:

keyframe_positions array

Position of each keyframe in keyframe_images. One entry per image. Each value must be 'first', 'last', or a timestamp in seconds (e.g. '1.67').

Default:

seed integer

Random seed. Set for reproducible generation

Version: 67a723556e73 Updated: 6/26/2026 246 runs