Seedream 5.5 Operational

Seedream 5.5 is the latest image creation model developed by ByteDance’s Seed team. It is currently being rolled out across platforms including Jimeng, Doubao, Doubao Work, and Volcano Ark. Seedream 5.5 focuses on more stable multi-round editing, preserving non-edited areas at the pixel level and supporting up to 100 consecutive modifications to the same work. It adds native RGBA transparent asset generation, directly outputting images with an Alpha channel and eliminating the need for post-processing background removal. Its image quality is also closer to real photography, while dense small-text rendering is more accurate. The severe text distortion rate has dropped to 0.4%, giving it an edge over mainstream models in text-to-image realism and text structure.

Stable multi-round editing: Preserves non-edited areas at the pixel level and supports up to 100 consecutive modifications to the same work without significant detail loss or quality degradation.
Native RGBA transparent asset generation: Directly outputs transparent or semi-transparent images with an Alpha channel, carefully handling contour edges and eliminating post-processing background removal and edge cleanup.
Transparent artistic text creation: Incorporates the brushwork, colors, and materials of a reference image into specified characters to directly generate artistic text assets with transparent backgrounds.
Cross-scene reuse of character assets: Uses the same set of transparent character assets as references, preserving character traits and visual quality while quickly generating a series of images with different scenes, poses, and compositions.
Realistic image generation: Improves lighting, material, and skin texture rendering, reducing oily highlights, overexposure, and mottling for a look closer to natural photography.
High-density text rendering: More accurately reproduces dense small text and complex character forms, reducing the severe text distortion rate to 0.4% and the minor distortion rate to 1.7%.

Pixel-level preservation in multi-round editing: The model treats the input image as both a content carrier and the context for editing instructions. Conditional controls, such as regional masks and instruction alignment, clearly distinguish areas to change from areas to preserve. During training, it creates large numbers of chained samples in which the output from one round becomes the input for the next, while adding pixel-level consistency constraints. This teaches the model to generate new content without disturbing the pixel distribution of unedited areas, suppressing quality degradation caused by accumulated errors across rounds.
Native RGBA transparent asset generation: Seedream 5.5 treats the Alpha channel as a prediction target parallel to RGB. Training data includes assets with transparency annotations, such as foreground segmentation and hair-level annotation data, allowing the model to learn transparency as an independent dimension. It also specifically optimizes high-frequency edge details such as feathers and lace, enabling the output of four-channel images with smooth edge transitions and no white or stray borders. In essence, background removal is integrated into the generation process.
Improved realism and text rendering: The model uses improved diffusion and generative training processes, along with a higher-quality data mix that more closely follows photographic image distributions. This reduces the plastic, overexposed, and oily appearance caused by training-distribution bias, while its loss design places greater emphasis on high-frequency details such as skin texture and lighting depth. For text rendering, training strengthens supervision of character structure and uses data augmentation for complex Chinese characters and dense small-text scenarios. This shifts the model’s learning from approximate shapes to accurate characters, substantially reducing incorrect, missing, and structurally disordered text.

Jimeng web version: Select Seedream 5.5 in “Create - Generate/Canvas” to generate and edit images.
Doubao: Switch to the Seedream 5.5 model in the “Image Generation” feature and describe the image with text.
Doubao Work: This intelligent assistant platform for office scenarios enables Seedream 5.5 through the “Skills” section, allowing its image-generation capabilities to be called directly in workflows.
Volcano Ark: Visit the Volcano Ark Experience Center at https://exp.volcengine.com/, then go to Vision Models → Image Generation and select Doubao-Seedream-5.5 to try it.

Stable multi-round editing for up to 100 rounds: Preserves non-edited areas at the pixel level, retaining details and image quality after 100 consecutive modifications so complex ideas can be refined continuously.
Native RGBA transparent asset output: Directly generates transparent images with an Alpha channel and carefully processed edges, eliminating post-processing background removal and edge cleanup so assets can enter design workflows independently.
Realistic image quality: Produces more natural lighting, materials, and skin textures with less oiliness and overexposure, creating results closer to real photography.
Highly accurate text rendering: Strongly reproduces dense small text and complex character forms, with a severe text distortion rate of only 0.4%, leading mainstream models in this area.
Twice the production usability: Across e-commerce, marketing, film and television, gaming, office work, and fashion design, usability in film and television and office scenarios is more than twice that of the previous version.

Official website: https://seed.bytedance.com/zh/seedream5_5
Technical paper: https://seed.bytedance.com/zh/blog/more-realistic-images-more-stable-editing-across-100-rounds-introducing-seedream-5-5

E-commerce product images: Generates realistic product and model-wearing images with detailed materials and lighting. Dense small-text labels remain clear, meeting product-detail-page production needs.
Marketing and poster design: Directly outputs RGBA transparent assets and artistic text, enabling layout and compositing without background removal and accelerating the production of high-quality marketing materials.
Film, television, and concept design: Supports 100 consecutive edits around the same work while stably preserving image details, making it suitable for repeatedly refining concept art, storyboards, and scene proposals.
Game and character design: Character assets can be reused across scenes while preserving character traits and flexibly adjusting poses and compositions, enabling efficient production of serialized character images.
Office and fashion design: Accurate rendering of complex characters and small text, combined with stable editing, makes it suitable for document illustrations, presentation graphics, and multi-round refinement of clothing and accessory details.