Runway Gen-4.5 AI Video Generator
Runway Gen-4.5 is Runway's latest flagship AI video generation model launched in December 2025, representing the "new frontier" of generative video technology. As a major upgrade to the Gen-4 series, this model introduces a breakthrough "Autoregressive-to-Diffusion (A2D)" hybrid architecture that completely solves the pain points of previous models in physical law simulation and long-term temporal consistency. It not only ranks first in Artificial Analysis's video arena with an Elo score of 1247, but also becomes the first choice for professional creators due to its precise restoration of fluid dynamics, gravity sensing, and complex lighting. Come to WeryAI to experience Runway Gen-4.5 for free and feel the creative power of images beyond reality!
Click or drag to upload images
Supports JPEG, PNG, GIF, WEBP, JPG formats Max 10MB, resolution max 4096 x 4096 pixels
Runway Gen-4.5 Core Features
Deep dive into Runway Gen-4.5 video generator's physics engine and hybrid architecture, experience precise and controllable cinematic creation.
Physics Simulation Engine
The most significant improvement of Gen-4.5 lies in its deep understanding of real-world physical laws. It can accurately simulate object weight, momentum, collisions, and complex fluid dynamics effects, completely eliminating the common "floating feeling" and counter-intuitive motion in AI videos.
Autoregressive-to-Diffusion Hybrid Architecture
Combines the scene understanding capability of autoregressive models with the visual high-fidelity of diffusion models. This hybrid technology ensures that characters and objects maintain structural integrity even during rapid movement or occlusion, without deformation or disappearance.
Strong Prompt Adherence
The model's execution of complex prompts has reached new heights, accurately restoring every detail described by users, including composition, lighting style, and interaction relationships between multiple subjects, achieving "what you think is what you get".
Micro-detail Temporal Consistency
Focuses on maintaining the stability of tiny details across time dimensions. Whether it's the flutter of hair, ripples on water, or skin texture, everything remains coherent throughout the video segment, eliminating the common "flickering" phenomenon in traditional models.
How to Use on WeryAI
Log in to Workspace
Enter the WeryAI creation workspace and click on the "Video Models" library in the left navigation bar.
Select Model
Find and select Runway Gen-4.5 (marked as New) in the model list.
Enter Description
Enter your detailed prompt in the text box (recommended to include action, lighting, and physical state descriptions), or upload a reference image to use the "Image to Video" feature.
Adjust Settings and Generate
Set video aspect ratio (such as 16:9) and duration (supports 5s or 10s), then click "Generate Now" to get high-definition video.
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Frequently Asked Questions
It is Runway's latest flagship text-to-video model, known for its excellent physics simulation capabilities and image stability, currently ranking first in industry benchmark tests.
Gen-4.5 introduces the A2D hybrid architecture. Compared to Gen-4, it has significant improvements in the physical realism of object movement (such as gravity and inertia), temporal consistency of images, and understanding of complex prompts.
Currently, Gen-4.5 supports generating high-definition video clips up to 10 seconds, which is very suitable for creating short videos, advertising shots, or film pre-visualization (Previs).
WeryAI provides free trial credits for new users. Since Gen-4.5 has higher computing costs, it consumes slightly more credits than older models. It is recommended to upgrade to Pro membership to get more generation times.
Yes. Gen-4.5's image-to-video feature is very powerful, able to perfectly preserve the style and character features of the reference image and make them move naturally.
Very suitable for commercial advertisements pursuing cinematic quality, visual effects (VFX) pre-visualization, complex physical dynamics displays (such as fluids and explosions), and narrative short film creation.
Experience Runway Gen-4.5 Now
Try Runway Gen-4.5 for free on WeryAI and create AI videos beyond imagination
No credit card required · Free trial for new users