Runway Gen-4.5

Runway Gen-4.5 turns a prompt, or a prompt and a first-frame image, into a 2 to 10 second 720p video. It follows sequenced actions and camera moves closely. For short cinematic shots, product moments and social clips.

Input

Fields marked * are required. Review the price before generating.

First Frame Image

Optional first frame image for image-to-video. Leave empty to run text-to-video.

Uploading a file needs an account. Create accountJPEG, PNG, WebP · up to 25 MB

Prompt *

Required. Describe the video you want to generate. Maximum 1000 characters.

Duration (seconds)

Required. Video duration in seconds. Also determines the price.

Additional settings

Aspect Ratio

Tips and requirements

Required. Aspect ratio of the generated video. Choose 'auto' to match the input image's aspect ratio to the closest supported ratio; for text-to-video only supported options are 16:9 and 9:16, auto defaults to 16:9.

Content Moderation

Optional. Public figure moderation threshold. Default to low

Seed

Optional. Fixed seed (0 to 4294967295) for reproducible results.

Starting price$0.39 / video

You sign up first. Your settings are kept.

API code for this input

Complete the required fields and fix input errors to see API code.

Input

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