ByteDance’s Seed team released Seedream 5.5 on November 9, the next version of its image generation and editing model. The update targets three problems that matter in production work: images that drift after repeated edits, the extra step of removing backgrounds, and garbled small text. You can try it in ByteDance’s Dola assistant and in the BytePlus model playground. Seed says a Pro version of the 5.5 series will follow.
Key changes
- Stable multi-turn editing: areas you do not ask to change are kept at the pixel level, without the colour shift that builds up over many edits. Seed demonstrates 100 rounds of editing on the same image.
- Transparent output: the model generates RGBA images with an alpha channel, including partial transparency for glass, smoke or hair, so cut-outs for products and stickers need no separate background removal.
- More realistic images: lighting, materials and skin look more natural, with less of the glossy, over-exposed look common in generated images.
- Small and dense text: Seed reports a 0.4% rate of severe text corruption and 1.7% for minor errors across Chinese and English, including complex Chinese characters and dense small text.
How Seed measured it
On its MagicArena platform, Seed tested six production areas: e-commerce, marketing, film and television, gaming, office documents and fashion design. Quality and usability improved over Seedream 5.0 Pro in all six, and usability more than doubled for film and television and for office work. In side-by-side preference tests the largest gain over 5.0 Pro was +55.62% for realism in image-to-image tasks. Against GPT Image 2.5 Sunburst and Nano Banana 2.1, Seed says Seedream 5.5 leads on text structure. These are the vendor’s own evaluations.
What it means for users
For e-commerce and marketing teams, transparent output and pixel-stable editing are the practical changes: a product shot can go through many small revisions without the rest of the image changing, and can be placed straight onto a new layout. Seed has not published API prices, resolution limits or a rollout schedule, so check the BytePlus console before planning production use.
Related tools
Compare it with Midjourney, Recraft, Leonardo.Ai and Canva Image Generator on ToolAI.