How to Create Videos with Runway Gen-4.5 Guide

Mastering Motion: A Complete Guide to Creating with Runway Gen-4.5

Gen-4.5 represents a monumental leap forward in generative AI video technology, establishing a state-of-the-art benchmark for motion quality, prompt adherence, and visual fidelity. Whether you are a seasoned filmmaker, a digital artist, or a creator looking to bring ideas to life, understanding how to harness Gen-4.5 allows for unprecedented control over camera choreography, scene composition, and dynamic storytelling.

Understanding Gen-4.5 Core Capabilities

Gen-4.5 currently supports two primary generation pathways: Text-to-Video and Image-to-Video. Unlike older iteration models, Gen-4.5 empowers you to specify intricate camera movements, precise event timing, and subtle atmospheric shifts directly inside a single prompt structure.

• Pricing: 12 credits per second of generated video.
• Supported Durations: Flexible lengths ranging from 2 to 10 seconds.
• Aspect Ratios: Standard widescreen support (such as 16:9 at 1280×720 px) alongside custom configurations.

Step 1 — Accessing Gen-4.5

Getting started with the model takes just a few clicks within the Runway platform:

1. Apps View Method: Navigate to the Apps View, then type Gen-4.5 into the top search menu.
2. Tool Mode Method: Alternatively, open Tool Mode, select Video at the top of the generation panel, and choose Gen-4.5 from the model dropdown menu.

Step 2 — Drafting the Prompt

Crafting an effective prompt depends heavily on whether you are working from scratch or animating an existing visual asset.

• Image-to-Video: Upload your source image by dragging and dropping it directly into the prompt window. Because the visual content is already provided, your text prompt should focus strictly on describing the motion and camera dynamics of the scene.
• Text-to-Video: Enter a clear, direct description outlining both the visual elements and the motion taking place.

Pro Tip: For advanced control, leverage Runway’s specialized resources like the Camera Terms, Prompts, & Examples guide to map out professional cinematography terms (such as tracking shots, pans, and shallow depth of field) directly into your text inputs.

Step 3 — Configuring Settings & Generating

Before hitting the generate button, review your layout configuration to match your creative vision:

• Aspect Ratio: Automatically adapts to match an input image by default, but can be adjusted to crop or reframe the shot.
• Duration: Choose anywhere from 2 to 10 seconds. Keep in mind that prompts involving multiple sequential actions generally benefit from longer durations, giving the model adequate time to execute movements naturally.
• FPS: Toggle between 24 or 25 fps inside the advanced settings.
• Export Formats: Creators on Max, Unlimited (Legacy), and Enterprise plans can select ProRes or a PNG Sequence as an output option (adding 5 credits per second).

Once configured, click the Generate button to begin processing.

Step 4 — Iterating and Refining

Gen-4.5 is built for rapid iteration. Once your video finishes rendering, you can upscale, favorite, or download your results using the right-side interface controls.

To continue building on your output, select the Use button located beneath the left side of the generation. From here, you can tweak your prompt adjustments, experiment with new camera angles, or chain generations together to map out complete, multi-shot narratives.