Overview
Seedream 5.5 is ByteDance's next-generation image creation model from the Seed team, released in November 2026. Three things carry the release: stable multi-round editing, native transparency, and better realism plus text rendering.
Multi-round editing is the most substantive improvement. ByteDance says you can edit the same piece up to 100 rounds, with untouched regions preserved at the pixel level and no color drift. In testing past a hundred consecutive edits, subject features, composition ratios and lighting outside the specified area held steady. For e-commerce images and poster retouching this matters more than single-image quality, because the classic failure was a fifth edit turning the whole image muddy.
Native RGBA is the other practical update. The model outputs images with an alpha channel directly, up to 100 transparent layers, which removes the cutout step from the pipeline. Realism work covers lighting, materials and skin texture, and dense small text renders more accurately, so fine print on a Chinese poster no longer blurs into a block.
Availability rolls out across Jimeng, Doubao, Doubao Work and Volcengine Ark, with the API opening on Ark this week and a Pro version said to be on the way. Pricing is where it lands hardest: a 2K square edit costs 0.28 yuan per image, 60% below Seedream 5.0 Pro, with generation nearly 40% faster. Commercial images that get revised repeatedly consume both, and a ten-round workflow widens that gap quickly.
Key Features
- Up to 100 consecutive edits: Keeps working on the same piece across up to 100 rounds; after more than a hundred edits in testing, subject features, composition and lighting outside the edited region stay consistent.
- Pixel-level preservation outside the edit: Only the specified area changes. Everything else holds at the pixel level, with no overall color cast creeping in across rounds.
- Native RGBA transparency: Outputs images with an alpha channel directly, up to 100 transparent layers, which drops the cutout step entirely for layered assets and overlays.
- Text rendering: Dense small text is noticeably more accurate, keeping multi-line copy, labels and captions on Chinese posters readable.
- More realistic surfaces: Lighting, materials and skin texture render closer to photography, narrowing the gap on people and product shots.
- Production pipeline access: Rolling out through Jimeng, Doubao, Doubao Work and Volcengine Ark, with the API opening this week and a Pro version announced as planned.
- Cost and speed per image: A 2K square edit costs 0.28 yuan, 60% less than Seedream 5.0 Pro, with generation close to 40% faster.
Use Cases
- E-commerce hero images and detail pages, revising backgrounds, swapping products and relighting the same shot without shifting the subject.
- Poster and campaign layout revisions where fine Chinese text has to stay legible.
- Design workflows that need transparent assets, taking the RGBA output straight into layered composites.
- High-volume production, where per-image cost and speed drive the total bill.
Pros
- Untouched regions stay pixel-stable after a hundred edits, so retouching does not restart from scratch each round.
- Native RGBA with up to 100 transparent layers removes cutout and manual layering work.
- A 2K edit at 0.28 yuan, 60% cheaper than the previous generation and nearly 40% faster.
- Text rendering improved enough that small Chinese type is usable.
- Available directly through domestic platforms, with Jimeng and Doubao ready to try and the Ark API opening alongside.
Pricing
A 2K square edit costs 0.28 yuan per image, 60% below Seedream 5.0 Pro, with generation nearly 40% faster. The API opens on Volcengine Ark this week, consumers can try it in Jimeng and Doubao, and the Pro version has not shipped yet; tiered pricing follows Volcengine's announcements.
Summary
Seedream 5.5 targets the parts of production workflows that break most often: untouched regions stay pixel-identical after up to 100 edits, output arrives with a native alpha channel and up to 100 transparent layers, and text plus realism both improve. A 2K edit costs 0.28 yuan, 60% cheaper and nearly 40% faster than the prior generation. It fits e-commerce, posters and commercial images that get revised repeatedly, with a Pro version announced as planned.
Version History
- Seedream 5.5 launches with 100-round editing and native transparency (2026-11-09): ByteDance's Seed team released Seedream 5.5 with three upgrades: up to 100 consecutive edits on one piece while untouched regions stay pixel-identical without color drift, native RGBA output with up to 100 transparent layers, and better lighting, material and skin texture plus denser small-text rendering. A 2K square edit costs 0.28 yuan, 60% below Seedream 5.0 Pro, with generation close to 40% faster. It is rolling out through Jimeng, Doubao, Doubao Work and Volcengine Ark, with the API arriving on Ark this week and a Pro version planned.