Katechon ArcMaximum length per generation
Veo 3.1 is a model for generating 8-second videos at 720p, 1080p or 4K with natively generated audio. Source: Google AI for Developers, Veo 3.1 documentation (ai.google.dev/gemini-api/docs/veo), checked 2026-10-18
Kling Video 3.0 produces up to 15 seconds of video in a single generation. Source: Kling AI, Kling Video 3.0 (kling.ai/feature/kling-video-3), checked 2026-10-18
Higgsfield: Cinema Studio 4.0 runs on Seedance 2.5 and makes clips of up to 30 seconds. Source: Higgsfield (higgsfield.ai/creator-hub/help-center/tools/how-do-i-use-cinema-studio), checked 2026-10-17
Hedra: Its own Character-3 and Hedra Avatar (image plus audio to talking video, up to 10 minutes per generation) plus Seedance 2.5, Kling V3, Wan 3.0, MiniMax H3 and others. Source: Hedra (hedra.com/models), checked 2026-10-17
| Tool or model | Longest single generation | Kind of video |
|---|---|---|
| Veo 3.1 | 8 seconds | General text or image to video |
| Kling 3.0 | 15 seconds | General, multi-shot |
| Arc (Seedance 2.0, Seedance 2.0 Fast, Seedance 2.0 Mini) | 15 seconds (minimum 4) | Story shots from references and storyboards |
| Higgsfield Cinema Studio 4.0 | 30 seconds | Directed clips |
| Hedra Avatar | Up to 10 minutes | Talking character from an image and audio |
Model prices on this page are Atlas Cloud list prices quoted 2026-10-17 with its free /calculate endpoint, as published in our AI video price index. Source: Atlas Cloud model catalog and /calculate list prices (atlascloud.ai/models), checked 2026-10-17
How long videos are actually made
Every long AI film we know of, ours included, is a sequence of short clips that share references. High Note runs 56 minutes and The Wolf Mother 47 minutes from 431 clips. Short clips are an advantage as much as a limit: a missed shot costs one regeneration, not a whole scene.
- Break the story into shots of 4–15 seconds, one action per shot.
- Build references for every recurring character and location.
- Generate shot by shot and regenerate the misses.
- Assemble in order, add narration, music and captions, and export.
When a longer single generation helps
- Talking-head and avatar content, where one continuous take is the point.
- Long continuous camera moves that would show a seam if cut.
- Fast drafts, when you want to see a whole beat at once.
Where Katechon Arc fits
Arc is built for long videos made the practical way: 4–15-second shots planned into episodes or chapters, assembled into a film you can download.
Arc cannot render a single clip longer than 15 seconds or a long talking-avatar take; tools built for avatars do that.
People also ask
Can Veo 3.1 make longer videos?
A single Veo 3.1 generation is 8 seconds per Google's documentation. Longer videos are built by joining or extending clips; check Google's current documentation for extension limits.
What is the best AI video generator for long videos?
One that holds many shots in one project with shared character and location references, because long videos are assembled from short clips.
Related answers
Sources
- Google AI for Developers, Veo 3.1 documentation: ai.google.dev/gemini-api/docs/veo, checked 2026-10-18
- Kling AI, Kling Video 3.0: kling.ai/feature/kling-video-3, checked 2026-10-18
- Higgsfield: higgsfield.ai/creator-hub/help-center/tools/how-do-i-use-cinema-studio, checked 2026-10-17
- Hedra: www.hedra.com/models, checked 2026-10-17
- Atlas Cloud model catalog and /calculate list prices: www.atlascloud.ai/models, checked 2026-10-17