Katechon ArcWhat ByteDance says it is
Seedance 2.0 adopts a unified multimodal audio-video joint generation architecture that supports text, image, audio and video inputs, and accepts images, audio and video as references. Source: ByteDance Seed, Seedance 2.0 (seed.bytedance.com/en/seedance2_0), checked 2026-10-18
What it is good for, from our productions
- Series with a recurring cast. Blood Sun: The Fall of Kratos (45 episodes) and High Note (40 episodes, about 5 core characters) held their faces across episodes with reference sheets on every shot.
- Long films. The Fall of Kalak: 427 shots, 13 characters and 21 locations, rendered in one day.
- Dialogue. On Fast at 16:9, dialogue came through essentially word-perfect in The Emperor's Pleasure Court.
- Volume on a budget. Most of our series ran on Mini at 720p; our first five series averaged $2.26 per finished minute in video.
Where it struggles
- It can invent a voice-over on near-empty shots, such as a black frame; give those shots an ambience-only sound note.
- Colour words land where you put them: "cold blue shade on her face" painted a character's skin blue. Keep colour on the environment, not on skin.
- Output moderation blocks faces that look like real celebrities (Atlas returns error 1012004, "may be related to copyright restrictions"); recast the face rather than rewriting the shot.
- About 1 in 15 Fast clips failed once and passed on retry in one of our series.
Tiers and prices
| Tier | Resolutions in Arc | List USD/s at 720p | Arc credits for a 10 s 720p clip |
|---|---|---|---|
| Seedance 2.0 | 480p, 720p, 1080p | $0.243 | 751 |
| Seedance 2.0 Fast | 480p, 720p | $0.194 | 226 |
| Seedance 2.0 Mini | 480p, 720p | $0.121 | 94 |
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. Seedance costs the same with audio on or off. Source: Atlas Cloud model catalog and /calculate list prices (atlascloud.ai/models), checked 2026-10-17
How to use it
- Use it through an app that hosts it, such as Arc, or through a model API provider.
- Make a reference image for each character and location first, then attach them to every shot.
- Write one action and one line of dialogue per shot, 4–15 seconds long in Arc.
- Draft on Mini, check the takes, and re-render only the shots that need more detail on Fast or the full model.
Where Katechon Arc fits
Arc is built on Seedance 2.0, Fast and Mini: you plan episodes, build references, storyboard and render in one project, with the credit cost shown before each clip.
Arc does not give raw API access to Seedance, and it does not offer Seedance 2.5; use a model API provider for either.
People also ask
Is Seedance 2.0 free?
No. Every second is billed through API providers and apps that host it, though some apps include trial credits.
Is Seedance 2.0 open source, and can you run it locally?
ByteDance's Seedance 2.0 page offers no model weights or download, so it is used as a hosted model; we know of no official way to run it locally.
Is Seedance 2.0 censored?
Hosted Seedance applies content moderation to inputs and outputs. In our productions the most common block was a character face that resembled a real celebrity.
Related answers
Sources
- ByteDance Seed, Seedance 2.0: seed.bytedance.com/en/seedance2_0, checked 2026-10-18
- Atlas Cloud model catalog and /calculate list prices: www.atlascloud.ai/models, checked 2026-10-17