Overview
- ByteDance’s Seed team published Seedream 5.5 on November 9, 2026, as a follow‑up to Seedream 5.0 Pro with features aimed at real production use.
- The model can perform stable multi‑round edits and keep non‑edited pixels intact for up to 100 consecutive revisions, which reduces color drift and detail loss during iterative work.
- Seedream 5.5 can natively output RGBA images with an alpha channel so designers get ready‑to‑use transparent or semi‑transparent assets without manual cutouts.
- Official tests run on the MagicArena platform show improved image texture and far better text rendering, with severe text errors down to 0.4% and minor errors to 1.7%, though the tests were organized by the model’s publisher.
- The model is rolling out to platforms such as Jimeng, Doubao and Volcanic Ark and is available via API with an input+output billing model that lists a 2K edit at about 0.28 yuan per image, and ByteDance says a Pro edition and Agent workflow integration are coming next.