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arXiv · 2512.13507

Seedance 1.5 pro: A Native Audio-Visual Joint Generation Foundation Model

Team Seedance·Heyi Chen·Siyan Chen·Xin Chen·Yanfei Chen·Ying Chen·Zhuo Chen·Feng Cheng·Tianheng Cheng·Xinqi Cheng·Xuyan Chi·Jian Cong·Jing Cui·Qinpeng Cui·Qide Dong·Junliang Fan·Jing Fang·Zetao Fang·Chengjian Feng·Han Feng·Mingyuan Gao·Yu Gao·Dong Guo·Qiushan Guo·Boyang Hao·Qingkai Hao·Bibo He·Qian He·Tuyen Hoang·Ruoqing Hu·Xi Hu·Weilin Huang·Zhaoyang Huang·Zhongyi Huang·Donglei Ji·Siqi Jiang·Wei Jiang·Yunpu Jiang·Zhuo Jiang·Ashley Kim·Jianan Kong·Zhichao Lai·Shanshan Lao·Yichong Leng·Ai Li·Feiya Li·Gen Li·Huixia Li·JiaShi Li·Liang Li·Ming Li·Shanshan Li·Tao Li·Xian Li·Xiaojie Li·Xiaoyang Li·Xingxing Li·Yameng Li·Yifu Li·Yiying Li·Chao Liang·Han Liang·Jianzhong Liang·Ying Liang·Zhiqiang Liang·Wang Liao·Yalin Liao·Heng Lin·Kengyu Lin·Shanchuan Lin·Xi Lin·Zhijie Lin·Feng Ling·Fangfang Liu·Gaohong Liu·Jiawei Liu·Jie Liu·Jihao Liu·Shouda Liu·Shu Liu·Sichao Liu·Songwei Liu·Xin Liu·Xue Liu·Yibo Liu·Zikun Liu·Zuxi Liu·Junlin Lyu·Lecheng Lyu·Qian Lyu·Han Mu·Xiaonan Nie·Jingzhe Ning·Xitong Pan·Yanghua Peng·Lianke Qin·Xueqiong Qu·Yuxi Ren·Kai Shen·Guang Shi
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Abstract

Recent strides in video generation have paved the way for unified audio-visual generation. In this work, we present Seedance 1.5 pro, a foundational model engineered specifically for native, joint audio-video generation. Leveraging a dual-branch Diffusion Transformer architecture, the model integrates a cross-modal joint module with a specialized multi-stage data pipeline, achieving exceptional audio-visual synchronization and superior generation quality. To ensure practical utility, we implement meticulous post-training optimizations, including Supervised Fine-Tuning (SFT) on high-quality datasets and Reinforcement Learning from Human Feedback (RLHF) with multi-dimensional reward models. Furthermore, we introduce an acceleration framework that boosts inference speed by over 10X. Seedance 1.5 pro distinguishes itself through precise multilingual and dialect lip-syncing, dynamic cinematic camera control, and enhanced narrative coherence, positioning it as a robust engine for professional-grade content creation. Seedance 1.5 pro is now accessible on Volcano Engine at https://console.volcengine.com/ark/region:ark+cn-beijing/experience/vision?type=GenVideo.

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Team Seedance, Heyi Chen, Siyan Chen, Xin Chen, Yanfei Chen, Ying Chen, Zhuo Chen, Feng Cheng, Tianheng Cheng, Xinqi Cheng, Xuyan Chi, Jian Cong, Jing Cui, Qinpeng Cui, Qide Dong, Junliang Fan, Jing Fang, Zetao Fang, Chengjian Feng, Han Feng, Mingyuan Gao, Yu Gao, Dong Guo, Qiushan Guo, Boyang Hao, Qingkai Hao, Bibo He, Qian He, Tuyen Hoang, Ruoqing Hu, Xi Hu, Weilin Huang, Zhaoyang Huang, Zhongyi Huang, Donglei Ji, Siqi Jiang, Wei Jiang, Yunpu Jiang, Zhuo Jiang, Ashley Kim, Jianan Kong, Zhichao Lai, Shanshan Lao, Yichong Leng, Ai Li, Feiya Li, Gen Li, Huixia Li, JiaShi Li, Liang Li, Ming Li, Shanshan Li, Tao Li, Xian Li, Xiaojie Li, Xiaoyang Li, Xingxing Li, Yameng Li, Yifu Li, Yiying Li, Chao Liang, Han Liang, Jianzhong Liang, Ying Liang, Zhiqiang Liang, Wang Liao, Yalin Liao, Heng Lin, Kengyu Lin, Shanchuan Lin, Xi Lin, Zhijie Lin, Feng Ling, Fangfang Liu, Gaohong Liu, Jiawei Liu, Jie Liu, Jihao Liu, Shouda Liu, Shu Liu, Sichao Liu, Songwei Liu, Xin Liu, Xue Liu, Yibo Liu, Zikun Liu, Zuxi Liu, Junlin Lyu, Lecheng Lyu, Qian Lyu, Han Mu, Xiaonan Nie, Jingzhe Ning, Xitong Pan, Yanghua Peng, Lianke Qin, Xueqiong Qu, Yuxi Ren, Kai Shen, Guang Shi. 2025-12-23. Seedance 1.5 pro: A Native Audio-Visual Joint Generation Foundation Model. https://arxiv.org/abs/2512.13507

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