ByteDance Launches Seedream 5.5: 100-Round Pixel-Stable Editing, 0.4% Text Error Rate
字节跳动Seed · wechat · 2026-11-09
ByteDance's Seed team officially released Seedream 5.5, its new image generation model aimed at professional visual production workflows, with three headline upgrades:
- Stable multi-round editing: pixel-level preservation of non-edited regions, eliminating color drift and quality decay across up to 100 consecutive editing rounds; demos include 100 rounds of editing around one subject, multi-round flower compositions, and room redesigns where perspective, occlusion and shadows stay consistent.
- Native RGBA output: the model directly generates transparent/semi-transparent images with alpha channels, handling fine edges without post-hoc matting, so outputs can be reused as standalone design assets across scenes.
- Realism and text rendering: improved lighting, materials and skin texture with less over-exposure; dense small-text and complex glyph rendering improved, with severe text corruption down to 0.4% and minor corruption to 1.7%.
Internal evaluation on the MagicArena platform across e-commerce, marketing, film, gaming, office and fashion scenarios shows higher scores and usability vs Seedream 5.0 Pro (usability more than doubled in film and office). Against GPT Image 2.5 Sunburst and Nano Banana 2.1, ByteDance claims leads in text structure and text-to-image realism, with photorealistic image-to-image GSB at +55.62%.
The model is rolling out on Jimeng, Doubao, Doubao Work and Volcano Ark; a Pro version is planned, alongside expansion into agent workflows.
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