ByteDance Releases Seedream 5.5 Image Model with Pixel-Level Edit Consistency
ByteDance's Seed team released Seedream 5.5, an image editing model that keeps unedited regions pixel-identical, with an official demo showing a character edited 100 rounds without drift, plus native transparent-background output. Severe text error rate dropped from 2.8% to 0.4%, and 2K square-image editing costs about RMB 0.28 per image, less than half of Seedream 5.0 Pro. The model is rolling out on Jimeng, Doubao and Doubao Work, and is available to developers via Volcano Ark as Doubao-Seedream-5.5.
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宝玉 (@dotey) · 2026-11-09 16
ByteDance Releases Image Model Seedream 5.5: The Same Image Can Be Edited 100 Times in a Row Without Distortion, Can Directly Output Transparent-Background Assets, Rolling Out on Jimeng and Doubao
ByteDance's Seed team released Seedream 5.5 on November 9. The most frustrating thing about editing images with AI is that as you make changes, other parts change too: swap a ring, and the face and colors shift along with it; after a few rounds, the image gets blurrier and blurrier.
The new version can keep areas that are not required to be changed unchanged at the pixel level. In the official demo, the same character was edited 100 times in a row, and the details still matched up. It can also directly generate images with transparent backgrounds, preserving hard-to-cut edges such as feathers, ready to be layered into posters and design drafts, eliminating the need for cutout work. Photo texture and small text are also more accurate, with the severe text error rate dropping from 2.8% in the previous generation to 0.4%.
ByteDance compared it with OpenAI's GPT Image 2.5 Sunburst and Google's Nano Banana 2.1. It has the lowest text error rate and also leads in the realism of text-to-image generation. Its advantage over Nano Banana 2.1 is not large, and its realism when editing a single image still lags by about 6%.
The model is gradually rolling out on Jimeng, Doubao, and Doubao Work; simply select Seedream 5.5 when generating images. Developers can try it on Volcano Ark under the model name Doubao-Seedream-5.5. In terms of pricing, the Seedream 5.5 API continues the two-part billing structure of "input image + output image," with no charges for text tokens. For example, for editing a 2K square image, the cost per image is around 0.28 yuan, less than half that of Seedream 5.0 Pro.
I have also tested it myself. Stability and transparent backgrounds are quite good, and it has value in practical scenarios such as games, e-commerce image editing, and video production. See the article for the full test.
Official blog: https://t.co/P2zWKiL7ib
↳ Quoting @dotey (宝玉): https://x.com/i/article/2119819226856701952
