Gen-4.5 AI Model to generate 720p clips for ads
Runway Video models Upgrade to use runway/gen-4.5
This page describes Runway’s Gen-4.5 video model and who chooses it. Gen-4.5 focuses on motion quality, prompt adherence and visual fidelity for short 720p clips, and it supports text-to-video plus image-to-video controls.
What it can do
- Reads images and screenshots
What people use it for
Ads and social clips
Create short 720p ad clips from a written brief or a reference image, keeping consistent camera moves and actor gestures across frames. Gen-4.5 is commonly chosen when fidelity and temporal consistency matter.
Proofs and mood tests
Generate quick 5-15 second proofs to test framing, pacing and color direction before committing a live shoot or edit. The model’s prompt adherence makes it useful for iterating visual direction rapidly.
Video-to-video edits and overlays
Apply image-to-video or video-to-video transforms to replace backgrounds, add elements, or restage a short shot while keeping original motion intact. Filmmakers use Gen-4.5 when they need controllable edits rather than fully unconstrained generations.
Why it is worth it
- High motion fidelity for short scenes and gestures.
- Strong adherence to text prompts and shot descriptions.
- Controls filmmakers expect: image-to-video and keyframe-style input.
- Included in Runway subscriptions so teams can access it alongside other models.
Questions people ask
What resolution and clip length does Gen-4.5 produce on Katteb?
Gen-4.5 is optimized for short 720p clips. Clip length and exact credit burn depend on duration; on Katteb a typical short clip costs 408 credits per generated video.
Which inputs does Gen-4.5 accept?
Runway’s Gen-4.5 supports text-to-video and image-to-video controls today, with other control modes rolling out in Runway’s apps. Use image references or prompt text to guide composition and motion.
When should I pick Gen-4.5 instead of a faster, cheaper model?
Choose Gen-4.5 when visual fidelity, temporal consistency and prompt obedience are priorities for short, cinematic clips. For large-volume or exploratory drafts, lower-cost models may be more credit-efficient.
