Seedance 2.5 trades resolution for length compared with Seedance 2.0. In its September 2026 catalog comparison, OpenRouter listed ByteDance’s Seedance 2.5 as supporting clips up to 30 seconds at 480p or 720p. Seedance 2.0 reached 4K but stopped at 15 seconds. This makes the versions suited to different delivery requirements. A longer continuous scene can fit within one 2.5 request, while a higher-resolution deliverable may require 2.0. OpenRouter also describes video references for editing or extending existing footage. These are documented interface capabilities; the article’s specifications alone do not demonstrate that every generated scene maintains visual continuity.
Terms in this piece · Glossary
token — The chunk of text a model reads and writes in — roughly three-quarters of a word — and the unit AI usage is billed in.
