Seedream 3.0 Technical Report

Yu Gao; Lixue Gong; Qiushan Guo; Xiaoxia Hou; Zhichao Lai; Fanshi Li; Liang Li; Xiaochen Lian; Chao Liao; Liyang Liu; Wei Liu; Yichun Shi; Shiqi Sun; Yu Tian; Zhi Tian; Peng Wang; Rui Wang; Xuanda Wang; Xun Wang; Ye Wang; Guofeng Wu; Jie Wu; Xin Xia; Xuefeng Xiao; Zhonghua Zhai; Xinyu Zhang; Qi Zhang; Yuwei Zhang; Shijia Zhao; Jianchao Yang; Weilin Huang

arXiv · 2504.11346

Seedream 3.0 Technical Report

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Abstract

We present Seedream 3.0, a high-performance Chinese-English bilingual image generation foundation model. We develop several technical improvements to address existing challenges in Seedream 2.0, including alignment with complicated prompts, fine-grained typography generation, suboptimal visual aesthetics and fidelity, and limited image resolutions. Specifically, the advancements of Seedream 3.0 stem from improvements across the entire pipeline, from data construction to model deployment. At the data stratum, we double the dataset using a defect-aware training paradigm and a dual-axis collaborative data-sampling framework. Furthermore, we adopt several effective techniques such as mixed-resolution training, cross-modality RoPE, representation alignment loss, and resolution-aware timestep sampling in the pre-training phase. During the post-training stage, we utilize diversified aesthetic captions in SFT, and a VLM-based reward model with scaling, thereby achieving outputs that well align with human preferences. Furthermore, Seedream 3.0 pioneers a novel acceleration paradigm. By employing consistent noise expectation and importance-aware timestep sampling, we achieve a 4 to 8 times speedup while maintaining image quality. Seedream 3.0 demonstrates significant improvements over Seedream 2.0: it enhances overall capabilities, in particular for text-rendering in complicated Chinese characters which is important to professional typography generation. In addition, it provides native high-resolution output (up to 2K), allowing it to generate images with high visual quality.

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Yu Gao, Lixue Gong, Qiushan Guo, Xiaoxia Hou, Zhichao Lai, Fanshi Li, Liang Li, Xiaochen Lian, Chao Liao, Liyang Liu, Wei Liu, Yichun Shi, Shiqi Sun, Yu Tian, Zhi Tian, Peng Wang, Rui Wang, Xuanda Wang, Xun Wang, Ye Wang, Guofeng Wu, Jie Wu, Xin Xia, Xuefeng Xiao, Zhonghua Zhai, Xinyu Zhang, Qi Zhang, Yuwei Zhang, Shijia Zhao, Jianchao Yang, Weilin Huang. 2025-06-28. Seedream 3.0 Technical Report. https://arxiv.org/abs/2504.11346

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