ByteDance Ships Seedream 5.5: Pixel-Stable Editing Across 100 Rounds, Native Transparent Assets, About 4 Cents a 2K Edit

ByteDance's Seed team released Seedream 5.5 on November 9, the newest version of the image-creation model that powers Doubao, Jimeng and Doubao Work. The company is pitching this release not on raw image quality but on a production problem that has kept generative images out of professional pipelines: keeping a picture consistent while it gets edited over and over.

The headline capability is multi-turn editing stability. ByteDance says the model preserves unedited regions at the pixel level and eliminates color shifts in those areas, reducing the detail loss and degradation that normally accumulate when each output becomes the next input. In its demonstration, the team performed 100 successive edits on a photo of the same person, swapping clothing, accessories and tabletop objects — while the model still adjusted small items like rings and eyeglass frames, rendered natural contact with skin, and kept occlusion and lighting coherent.

The second upgrade is native RGBA generation. Seedream 5.5 can produce images with an alpha channel directly, including full and partial transparency, so generated elements arrive as standalone design assets without a separate background-removal or edge-cleanup step. ByteDance's demos include a snowy owl with clearly separated feather layers and claw outlines, and character assets that can be re-posed and recomposed across scenes.

Third, the company says the model renders lighting, materials and skin textures more naturally while cutting the excessive gloss and overexposure common to generated photos, and that it handles complex character shapes and densely arranged small text noticeably better — a persistent weak spot for image models working on infographics and packaging.

Rollout and pricing: Seedream 5.5 is already live in Doubao, Doubao Work and Jimeng, with the API arriving on Volcengine Ark "soon." Billing follows the same two-part structure as before — input images and output images are charged separately, and text instructions cost nothing. A 2K square edit runs about 0.28 yuan, roughly four US cents and less than half the cost of the same edit on Seedream 5.0 Pro. Volcano Engine says generation speed is nearly 40 percent faster than the previous version. A Pro version with more complex contextual input is planned, and ByteDance says it wants to push the model into agent workflows for film, e-commerce and advertising production.

The evaluation numbers deserve a caveat: they are all company-reported. ByteDance says expert raters on its MagicArena platform scored 5.5 above 5.0 Pro in all six tested scenarios, that usable rates more than doubled in film-television and office work, that text-corruption rates came in at 0.4 percent severe and 1.7 percent minor, and that the model beats GPT Image 2.5 Sunburst and Google's Nano Banana 2.1 on text structure and text-to-image realism. No independent benchmark was published at launch.

The competitive timing is pointed. OpenAI pushed Images 2.6 to ChatGPT, Codex and its API five days earlier, and Adobe now lets Photoshop call Google and Black Forest Labs models alongside its own. As one-shot image quality converges, the battleground is shifting to edit reliability and per-edit economics — which is exactly the ground ByteDance chose to stand on.