Gen4 Aleph on AI Compare Hub
Gen4 Aleph is Runway's specialized video-to-video editing model — transforming and re-imagining existing videos through AI. Edit videos, change environments, add objects, and generate new scenes with precision on AI Compare Hub.
What you can create
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Video element editing and object replacement
Edit specific elements within videos—add, remove, or replace objects and characters. Gen4 Aleph maintains spatial consistency while applying your creative edits to existing footage.
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Environmental and scene transformation
Change video environments, settings, and backgrounds while preserving character motion and performance. Transform a simple scene into a luxurious environment or reimagine settings entirely.
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Style, lighting, and color grading
Apply cinematic style transformations, adjust lighting conditions, and regrade video sequences. Control mood, atmosphere, and visual tone through detailed text instructions.
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Shot continuation and next-frame generation
Extend video sequences by generating what comes next. Use Aleph to continue scenes, extend camera movements, or imagine alternative narrative directions from existing footage.
Why creators choose Gen4 Aleph
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Precision video-to-video transformation
Gen4 Aleph is built specifically for in-context video editing, understanding the spatial relationships and motion in existing footage. It applies transformations while respecting the original composition and character movement.
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Reference image conditioning
Guide transformations using reference images. Provide examples of the style, environment, or visual direction you want, and Gen4 Aleph applies those characteristics to your video.
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Flexible aspect ratio support
Generate edited videos in multiple aspect ratios: 16:9, 4:3, 1:1, 3:4, and 9:16. Adapt edited content for different platforms and viewing contexts without re-editing.
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Detailed motion and character preservation
Gen4 Aleph preserves original character performances, facial expressions, and body movements while applying environmental or stylistic changes. This is ideal for editorial work that requires maintaining actor performances.
How to generate your first video edit
- Upload your source video. Provide a video clip (up to 5 seconds) that you want to edit or transform. This becomes the foundation for all editing operations.
- Configure your edits. Write detailed instructions about what you want to change—describe new environments, removed/added objects, style changes, or lighting adjustments. Select your target aspect ratio and resolution.
Common questions
What is Gen4 Aleph?
Gen4 Aleph is Runway's in-context video editing model that transforms existing videos through AI. It understands spatial relationships in your footage and applies creative edits—changing objects, environments, styles, and lighting while preserving original character movement and composition.
What can I edit with Gen4 Aleph?
Gen4 Aleph handles object manipulation (add/remove/replace), environment changes, scene generation, style transformations, lighting adjustments, camera movements, and novel view generation. You can also continue scenes or explore alternative narrative directions.
What's the maximum video duration for Gen4 Aleph?
Gen4 Aleph supports a maximum of 5 seconds per generation. For longer videos, divide your content into segments and process each separately, then combine them for final output.
How can you use Gen4 Aleph on AI Compare Hub?
To edit videos with Gen4 Aleph on AI Compare Hub, click the "Gen4 Aleph" button at the top of this page. Upload your source video, write your editing instructions, configure your aspect ratio, and generate in seconds. You can also compare Gen4 Aleph side-by-side with other leading AI models — all in one place, for free.
Key Parameters
- Category: Video
- Released: January 2025
- Video-to-Video generation supported
- Processing speed: slow
For the Use of This Model
The Gen-4 Aleph model by Runway is a powerful in-context video editing and transformation model that lets you apply artistic, structural, and semantic changes to existing video clips. Before you use it on AI Compare Hub, please keep in mind:
- Use responsibly. Do not create or share content that is harmful, misleading, or that violates others’ rights. Runway’s Usage Policy prohibits certain content, including child exploitation, explicit sexual or extremely violent imagery, hateful or harassing content, privacy-violating or impersonation content, and unlawful uses. You are responsible for what prompts you submit and how you use the outputs.
- Outputs & responsibility. You control the videos you generate or edit here. Runway indicates that you, as the user, retain ownership of the content you create or transform. You must also ensure your usage complies with copyright, privacy, and other applicable laws. You may not use outputs to train or build competing AI models unless explicitly permitted by Runway.
- Capabilities & limits. Gen-4 Aleph supports a variety of transformations on input videos, such as object addition/removal, scene manipulation, camera angle changes, lighting or style adjustments, and novel view generation. [Runway Aleph Official docs]
• Maximum generation duration: 5 seconds (it uses only the first 5 seconds by default)
• Supported output resolutions/aspect ratios: e.g. 1280×720 for 16:9, variants for 9:16, 1:1, etc.
• Credit cost: ~ 15 credits per second of video transformation.
• Input video size limit: 64 MB (and only first 5 s used).
• Interface mode: supports “Chat Mode” or “Tool Mode” for prompt interaction and iterative edits. - No guarantees. Outputs are generated probabilistically and may not always align perfectly with your intent. The model and this service are provided “as is” without warranties.
- Terms of use. Your use of this model is governed by Runway’s Terms of Use. Also, when embedding or using the API, you must include the attribution “Powered by Runway” (linking to runwayml.com). ([Replicate Aleph readme](https://replicate.com/runwayml/gen4-aleph))
- Restrictions reminder. U.S. export controls apply—Runway prohibits use in embargoed jurisdictions or by denied parties. All restricted or unlawful activities are also prohibited under their terms. And per usage policy, certain content categories (violence, hate, sexual content, privacy violations, etc.) are disallowed.
Your use of this feature is also subject to this site’s Terms of Service.
Try Gen4 Aleph on AI Compare Hub
Generate with Gen4 Aleph directly on AI Compare Hub. Compare results side by side with other leading AI models using the same prompt.