Seedream 5.5 in short
Seedream 5.5 is ByteDance's next release in the Seedream image line, announced with precise multi-round editing, transparent and semi-transparent output, up to 99-layer separation, native multilingual text, and 4K rendering up to 8.29 megapixels.
ByteDance has published early documentation covering the capabilities above. The public API doc and pricing are listed as to be published, so a dated model id and a release day arrive with the API itself. This page updates with the official figures the moment they do.
What Seedream 5.5 brings
| Capability | What it means | Status |
|---|---|---|
| Precise multi-round editing | Edit a region, keep every other pixel identical, iterate without quality degradation | Confirmed by ByteDance |
| Transparent output | Transparent and semi-transparent backgrounds in text-to-image and image-to-image | Confirmed by ByteDance |
| Up to 99 editable layers | Background, element, and text layers; text layers include structured text recognition | Confirmed by ByteDance |
| Native multilingual text | Small, dense, and multilingual copy with correct letterforms | Confirmed, with examples in Russian, Thai, Japanese, Filipino |
| 4K rendering | Up to 8.29 MP, including 3840 × 2160 at 16:9 | Confirmed by ByteDance |
| Multi-image blending | Combine one or more reference assets with consistent scale, perspective, and lighting | Confirmed by ByteDance |
| Pricing and dated model id | Exact per-image price and the API model id | To be published |
Everything above comes from ByteDance's own announcement. The two open items — pricing and the dated API model id — are listed as to be published, so a release day lands with the public API doc.
What Seedream 5.5 can do, in detail
| Area | How it works |
|---|---|
| Multi-round editing | Edit a region while every other pixel stays identical, round after round |
| Realism and blending | Steadier faces, materials and lighting; references combine at one scale |
| Multilingual rendering | Small, dense and multilingual text for labels, posters and marketing |
| Transparent output | Transparent backgrounds in both modes, so no cutout pass is needed |
| Layer separation | One base image plus up to 99 layers; text layers come back readable |
| 4K and aspect ratios | Up to 8.29 megapixels including 4K UHD at 16:9; 1K-2K are shortcuts |
The two capabilities to watch first are multi-round editing and layer separation. Together they turn a generated image into a design file: you edit a region without disturbing the rest, then split the result into background, element, and text layers for further editing, localization, and template reuse.
When it lands on Morphic
ByteDance has announced the model and published early documentation; the public API doc and pricing are listed as to be published. A release shows up first on ByteDance's own channels — a post on its Seed blog, then an official BytePlus model page, then the model appearing in production image APIs with a dated model id. The Seedream line is already on Morphic, so 5.5 is expected to arrive here when the API publishes. This page is updated with the real figures the moment they do.
What to use right now
The current Seedream image model is on Morphic today. It handles grounded, region-precise editing, layer decomposition, and native multilingual text, and it runs in one workspace alongside the rest of the image line, so you can compare models on the same prompt. Open the Seedream 5.5 image editor to start, or browse the Seedream 5.5 prompt library for ready-to-run prompts.