ByteDance's Seed team introduced Seedream 5.5 on November 9, 2026, describing it as its next-generation image creation model. The company said the release is aimed at professional visual production, where what matters is whether a model consistently delivers usable results on deadline and within budget. It lists three headline upgrades: more stable multi-turn editing, native transparent-background output, and more realistic images with clearer text.
On editing, ByteDance says targeted training lets Seedream 5.5 preserve unedited regions at the pixel level, so errors do not accumulate when one output becomes the next input. The company says this supports continued work on a single image across 100 rounds of editing. On transparency, the model can directly generate RGBA images with an alpha channel, including full and partial transparency, so generated elements can be used as standalone assets without separate background removal or edge cleanup. ByteDance also says the model renders lighting, materials, and skin textures more naturally and handles dense small text, including complex Chinese characters, more accurately.
The performance claims come from ByteDance's own evaluations. Using the MagicArena platform across six use cases (e-commerce, marketing, film and television, gaming, office productivity, and fashion design), the company says Seedream 5.5 beat Seedream 5.0 Pro on both quality scores and usability rates in every case, with usability more than twice as high in film and television and in office productivity. In expert side-by-side comparisons it reports a +55.62% GSB score for realism in image-to-image tasks, and says it leads GPT Image 2.5 Sunburst and Nano Banana 2.1 on text structure and shows a substantial advantage on text-to-image realism. It reports a severe text corruption rate of 0.4% and a minor rate of 1.7% in Chinese and English tests. These figures have not been independently verified.
On availability, Beijing News reported on November 9 that Seedream 5.5 is already integrated into Doubao, Doubao Work, and Jimeng, with API access coming soon on Volcano Ark. The outlet reported that API pricing keeps the two-part structure of input-image plus output-image charges with no text-token fees, and cited roughly 0.28 yuan per 2K square-image edit, less than half the cost of Seedream 5.0 Pro. Beijing News also reported that generation speed is substantially faster than the previous generation. Other outlets describe rollout across additional ByteDance products, and reports on the exact API timing differ, so developers should check ByteDance's channels for current access.
ByteDance said a Pro version of the Seedream 5.5 series will follow, supporting more complex contextual inputs and creative instructions, and that it plans to extend the model into agent workflows for film, e-commerce, advertising, and design. No Pro release date was given.