Runway Gen-4.5
Runway's flagship video model with realistic physics and strong visual fidelity for text-to-video and image-to-video.
Gen-4.5 is a cloud video-generation model built by Runway. It produces short video clips from a text prompt or a starting image. Clips run up to 10s at 720p. It also supports seed control. It runs through Runware, Replicate, OpenRouter, and Runway using your own API key, from about $0.12 per second of output.
- Released
- 9 months ago (Dec 2025)
- Pricing
- $0.12 per second
- Max resolution
- 720p
- Aspect ratios
- 16:9, 9:16, 4:3 +3 more
- Clip length
- Up to 10s
- Image-to-video
- Start frame
- Seed control
- Supported
Examples
Generated with Gen-4.5 via Runware. The same two prompts run against every video model in the catalog (one landscape, one portrait), so the only thing that changes between two models’ clips is the model.
Camera motion, scene coherence over time
Fluid motion, fine detail, temporal stability
Runway
Runway builds the Gen family of generative video models, pioneering high-fidelity text-to-video and image-to-video for filmmakers and creators.
runwayml.com ↗