A New Frontier.
Runway's latest milestone. Topping the charts with a 1,247 Elo score on Artificial Analysis benchmarks. It brings precise prompt adherence, realistic physical dynamics, and expressive character details.
Core leaps in Gen-4.5 compared to previous generations
Gen-4.5 achieves unprecedented physical accuracy. Objects possess real weight, momentum, and force; liquid flow follows kinetic principles; and minute details like hair strands and fabric weaves remain coherent in motion. It precisely understands and executes complex scene descriptions.
Characters are no longer rigid models. Gen-4.5 renders subtle emotional shifts, natural gestures, and lifelike facial details.
From indistinguishable photorealism to highly artistic stylized animations. Gen-4.5 maintains a consistent visual language throughout.
Runway collaborates deeply with NVIDIA. Gen-4.5 is trained and inferenced entirely on NVIDIA Hopper and Blackwell series GPUs. This ensures that while image quality improves drastically, generation speed remains comparable to Gen-4.
Gen-4.5 excels at handling complex scenes with multiple elements. Whether it's a busy street or intricate machinery, it ensures accurate placement and fluid motion for every element.
Watch the latest tech launch from Runway, featuring deep dives into GWM1 and the future of Gen-4.5.
FAQ
Gen-4.5 ranks #1 on the Artificial Analysis text-to-video benchmark (1,247 Elo). Its core improvements are in physical accuracy, complex prompt understanding, and visual fidelity.
Official confirmation states that all existing control modes will be introduced to Gen-4.5, including Image to Video, Keyframes, and Video to Video.
Gen-4.5 maintains generation speeds and efficiency comparable to Gen-4. It will be offered at comparable pricing across all subscription plans, aiming to democratize top-tier video generation.
As a video generation model, it still faces some common issues: causal reasoning (effects sometimes precede causes), object permanence (objects occasionally disappear), and success bias (actions tend to be too successful/smooth). The Runway team is actively working on these.