Runway Gen-4.5

by Runway December 1, 2025

Runway Gen-4.5 is an AI video generation model that creates short video clips from text prompts or static images with high visual fidelity and smooth motion. It supports both text-to-video and image-to-video generation with a range of aspect ratios and clip durations. Gen-4.5 emphasizes realistic motion, strong prompt adherence, and controllable composition, making it suitable for cinematic sequences and creative video workflows.

Directing motion in image-to-video prompts
How to write Gen-4.5 image-to-video prompts that direct motion instead of redescribing the scene. Covers the camera and subject channels, naming common camera moves, and layering atmospheric motion on top.