RunwayML Gen4 Aleph

Runway Gen4 Aleph

Transform your videos with natural language instructions. Runway Gen4 Aleph is a powerful video-to-video model that understands text prompts to edit, modify, and reimagine your footage — from removing objects to changing environments and styles.

Why It Looks Great

• Natural language editing: Simply describe what you want changed — remove objects, alter backgrounds, modify styles.
• Context-aware transformations: Understands scene structure and maintains visual coherence throughout edits.
• Reference image guidance: Optionally provide a reference image to guide the visual style or target appearance.
• Flexible aspect ratios: Supports 16:9, 4:3, 1:1, 3:4, and 9:16 for any output format.
• Prompt Enhancer: Built-in tool to help refine and improve your editing instructions.
• Temporal consistency: Maintains smooth, stable results across all frames.

Parameters

Parameter	Required	Description
prompt	Yes	Text instruction describing the edit (e.g., "Remove people from the video").
video	Yes	Source video file (upload or public URL).
aspect_ratio	No	Output aspect ratio: 16:9, 4:3, 1:1, 3:4, or 9:16. Default: 16:9.
reference_image	No	Reference image to guide style or appearance (upload or URL).

How to Use

1. Write your prompt — describe the transformation you want (e.g., "Remove people from the video", "Change the sky to sunset", "Make it look like a watercolor painting").
2. Use Prompt Enhancer (optional) — click the button to refine your instructions for better results.
3. Upload your video — drag and drop or paste a public URL.
4. Choose aspect ratio — select the output format that fits your needs.
5. Add reference image (optional) — provide visual guidance for the target style.
6. Run — click the button to start processing.
7. Download — preview and save your transformed video.

Pricing

Per-second billing based on input video duration.

Metric	Cost
Per second	$0.18

Examples

Video Length	Calculation	Total Cost
5s	5 × $0.18	$0.90
10s	10 × $0.18	$1.80
30s	30 × $0.18	$5.40

Best Use Cases

• Object Removal — Remove unwanted people, objects, or distractions from footage.
• Environment Changes — Transform backgrounds, skies, or settings without reshooting.
• Style Transfer — Apply artistic styles, color grades, or visual aesthetics to existing videos.
• Visual Effects — Add weather effects, lighting changes, or atmospheric modifications.
• Content Repurposing — Adapt existing footage for new contexts or creative directions.

Example Prompts

• "Remove people from the video"
• "Change the background to a tropical beach"
• "Make it look like a vintage film from the 1970s"
• "Add snow falling throughout the scene"
• "Transform into an anime style"
• "Replace the sky with a dramatic sunset"

Pro Tips for Best Results

• Be specific and clear in your prompts — describe exactly what you want changed and how.
• Use the Prompt Enhancer to improve vague or simple instructions.
• For style changes, provide a reference image that captures the target aesthetic.
• Start with shorter clips to test your prompt before processing longer videos.
• Combine object removal with style changes in a single prompt for complex edits.

Notes

• If using URLs for video or reference image, ensure they are publicly accessible. A preview in the interface confirms successful loading.
• Processing time scales with video duration and complexity of the requested edit.
• Complex transformations may require more descriptive prompts for best results.