Seedance 1.5 pro: A Native Audio-Visual Joint Generation Foundation Model
Authors: name: Heyi Chen; name: Siyan Chen; name: Xin Chen; name: Yanfei Chen; name: Ying Chen; name: Zhuo Chen; name: Feng Cheng; name: Tianheng Cheng; name: Xinqi Cheng; name: Xuyan Chi; name: Jian Cong; name: Jing Cui; name: Qinpeng Cui; name: Qide Dong; name: Junliang Fan; name: Jing Fang; name: Zetao Fang; name: Chengjian Feng; name: Han Feng; name: Mingyuan Gao; name: Yu Gao; name: Dong Guo; name: Qiushan Guo; name: Boyang Hao; name: Qingkai Hao; name: Bibo He; name: Qian He; name: Tuyen Hoang; name: Ruoqing Hu; name: Xi Hu; name: Weilin Huang; name: Zhaoyang Huang; name: Zhongyi Huang; name: Donglei Ji; name: Siqi Jiang; name: Wei Jiang; name: Yunpu Jiang; name: Zhuo Jiang; name: Ashley Kim; name: Jianan Kong; name: Zhichao Lai; name: Shanshan Lao; name: Yichong Leng; name: Ai Li; name: Feiya Li; name: Gen Li; name: Huixia Li; name: JiaShi Li; name: Liang Li; name: Ming Li; name: Shanshan Li; name: Tao Li; name: Xian Li; name: Xiaojie Li; name: Xiaoyang Li; name: Xingxing Li; name: Yameng Li; name: Yifu Li; name: Yiying Li; name: Chao Liang; name: Han Liang; name: Jianzhong Liang; name: Ying Liang; name: Zhiqiang Liang; name: Wang Liao; name: Yalin Liao; name: Heng Lin; name: Kengyu Lin; name: Shanchuan Lin; name: Xi Lin; name: Zhijie Lin; name: Feng Ling; name: Fangfang Liu; name: Gaohong Liu; name: Jiawei Liu; name: Jie Liu; name: Jihao Liu; name: Shouda Liu; name: Shu Liu; name: Sichao Liu; name: Songwei Liu; name: Xin Liu; name: Xue Liu; name: Yibo Liu; name: Zikun Liu; name: Zuxi Liu; name: Junlin Lyu; name: Lecheng Lyu; name: Qian Lyu; name: Han Mu; name: Xiaonan Nie; name: Jingzhe Ning; name: Xitong Pan; name: Yanghua Peng; name: Lianke Qin; name: Xueqiong Qu; name: Yuxi Ren; name: Kai Shen; name: Guang Shi; name: Lei Shi; name: Yan Song; name: Yinglong Song; name: Fan Sun; name: Li Sun; name: Renfei Sun; name: Yan Sun; name: Zeyu Sun; name: Wenjing Tang; name: Yaxue Tang; name: Zirui Tao; name: Feng Wang; name: Furui Wang; name: Jinran Wang; name: Junkai Wang; name: Ke Wang; name: Kexin Wang; name: Qingyi Wang; name: Rui Wang; name: Sen Wang; name: Shuai Wang; name: Tingru Wang; name: Weichen Wang; name: Xin Wang; name: Yanhui Wang; name: Yue Wang; name: Yuping Wang; name: Yuxuan Wang; name: Ziyu Wang; name: Guoqiang Wei; name: Wanru Wei; name: Di Wu; name: Guohong Wu; name: Hanjie Wu; name: Jian Wu; name: Jie Wu; name: Ruolan Wu; name: Xinglong Wu; name: Yonghui Wu; name: Ruiqi Xia; name: Liang Xiang; name: Fei Xiao; name: XueFeng Xiao; name: Pan Xie; name: Shuangyi Xie; name: Shuang Xu; name: Jinlan Xue; name: Shen Yan; name: Bangbang Yang; name: Ceyuan Yang; name: Jiaqi Yang; name: Runkai Yang; name: Tao Yang; name: Yang Yang; name: Yihang Yang; name: ZhiXian Yang; name: Ziyan Yang; name: Songting Yao; name: Yifan Yao; name: Zilyu Ye; name: Bowen Yu; name: Jian Yu; name: Chujie Yuan; name: Linxiao Yuan; name: Sichun Zeng; name: Weihong Zeng; name: Xuejiao Zeng; name: Yan Zeng; name: Chuntao Zhang; name: Heng Zhang; name: Jingjie Zhang; name: Kuo Zhang; name: Liang Zhang; name: Liying Zhang; name: Manlin Zhang; name: Ting Zhang; name: Weida Zhang; name: Xiaohe Zhang; name: Xinyan Zhang; name: Yan Zhang; name: Yuan Zhang; name: Zixiang Zhang; name: Fengxuan Zhao; name: Huating Zhao; name: Yang Zhao; name: Hao Zheng; name: Jianbin Zheng; name: Xiaozheng Zheng; name: Yangyang Zheng; name: Yijie Zheng; name: Jiexin Zhou; name: Jiahui Zhu; name: Kuan Zhu; name: Shenhan Zhu; name: Wenjia Zhu; name: Benhui Zou; name: Feilong Zuo
Published: 2025-12-15 16:36:52

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.