Gen-4

video

by Runway · Updated December 1, 2025

Gen-4 is Runway's newest video generation model featuring industry-leading physical accuracy, professional-grade controls, and improved realism. It uses autoregressive-to-diffusion techniques for strongest prompt adherence and realistic physics simulation in generated video content.

Best For

Physical accuracyProduct demosMusic videosProfessional controlRealistic physics

Prompting Tips

1Gen-4 has the strongest prompt adherence — be very specific about what you want
2Describe physics and material interactions for realistic results
3Supports HD/1080p output with 4-20 second clips
4Use keyframe control for precise temporal direction
5Combine with image-to-video for consistent character appearance

Syntax & Constraints

Natural language prompts. Text-to-video and image-to-video. HD/1080p, 4-20 second clips. Advanced: keyframes, motion brush, camera controls.

Example Prompts

📦 Product Mockups

Smartphone product reveal

A sleek smartphone being placed on a glass table, slow motion. The phone's screen lights up showing a colorful app interface. Subtle reflections on the glass surface, soft studio lighting, product commercial aesthetic. Clean white studio background. 6 seconds.

producttechcommercial

🏔 Landscape & Scenery

Tokyo night hyperlapse

Hyperlapse through a bustling Tokyo street at night, neon signs reflecting on wet pavement, crowds of people flowing past, steam rising from food stalls. Camera moves forward smoothly at walking speed. Cyberpunk atmosphere, vivid colors. 10 seconds.

hyperlapsetokyoneon