Gen-4.5
Gen-4.5 creates video from a text prompt or a starting image. Runway’s product guide supports ordered actions and camera instructions within the prompt, with clip duration selected separately.
A starting image changes what the prompt must describe
For image-to-video, Runway recommends using the prompt to specify motion. For text-to-video, the prompt must establish both the scene and its movement. The product guide lists different aspect-ratio options for these two routes. Choose the input route before designing a series of shots.Creating with Gen-4.5
Describe a sequence the clip can show
Practical guidance. For a short product shot, specify the subject, camera movement and one main action. Check that the result preserves the product’s shape and text. If several actions must occur in order, review their timing in the actual clip instead of relying on the prompt alone.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Access | API, Provider product |
| Model identifiers | gen4.5 |
| Creative product duration | 2–10 seconds, according to the Gen-4.5 guide.Creating with Gen-4.5 |
| Creative product frame rate | 24 or 25 fps; the guide lists 720p output.Creating with Gen-4.5 |
| API list price | $0.12 per second for the listed generation service. Check output-format charges separately.Runway Dev model catalog |
Related models
Runway’s video-editing model, using an edited keyframe to carry changes across clips and multiple shots.
Launch date not confirmedAPI · Provider product- Gen-4 Turbo
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Launch date not confirmedAPI · Provider product A video-finishing model that converts standard-dynamic-range footage to HDR.
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