What is Runway?
Runway is a creative AI platform that brings professional video capabilities to anyone with an idea and a keyboard. Its latest flagship model, Gen-4.5 (described as its most capable video model yet), turns text prompts or still images into smooth, cinematic video clips. Runway also offers Gen-4, Gen-3 Alpha, and a full suite of AI editing tools — object removal, background swap, motion tracking, and more.
Think of it as the AI creative studio for video that Canva is for images.
Best Use Cases
Text-to-Video Generation
Describe a scene and Runway renders it as a short video clip — typically 5–10 seconds. These clips work brilliantly as b-roll, social media content, background videos, or creative intros.
Try this prompt: "A time-lapse of a sunset over a calm ocean, golden light reflecting on the water, cinematic wide shot."
Animating Still Images
Upload any image — a photo, an illustration, a Midjourney output — and Runway brings it to life with natural motion. Great for turning product photos into video ads or making portraits subtly animate.
How to do it: In Runway, choose your preferred model (Gen-4.5 for best quality, or Gen-3 Alpha Turbo for fastest results) → "Image to Video," upload your image, and add a motion prompt like "gentle camera push in, leaves swaying."
AI Video Editing
Runway's editing tools work on existing footage. Remove an unwanted object from a video with Object Eraser, replace a background without a green screen with Green Screen AI, or expand the frame of a shot with Expand.
Getting Started
- Go to runwayml.com and create a free account.
- Click "Generate" and select a model — Gen-4.5 for best quality, or Gen-3 Alpha Turbo for fast results.
- Choose "Text to Video" and describe your scene in the prompt box.
- Adjust duration (5 or 10 seconds) and aspect ratio, then click Generate.
- Preview the result, download it, or use it as input for further editing in Runway's editor.
Tips for Beginners
- Short, specific prompts work better. Unlike text tools, overly long prompts can confuse Runway. Aim for a clear, single-scene description.
- Include camera movement. Prompts like "slow push forward," "orbiting shot," or "static camera" help Runway understand the motion style you want.
- Use image-to-video for consistent subjects. Text-to-video struggles to generate a specific person or product consistently. Start with an image of your subject, then animate it.
- Credits go fast. The free plan gives 125 credits (roughly 25 five-second videos). Plan your experiments before generating, and use the preview mode to test settings first.