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Related papers: LongCat-Flash-Omni Technical Report

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We present LongCat-Flash-Thinking, an efficient 560-billion-parameter open-source Mixture-of-Experts (MoE) reasoning model. Its advanced capabilities are cultivated through a meticulously crafted training process, beginning with long…

Artificial Intelligence · Computer Science 2025-11-10 Meituan LongCat Team , Anchun Gui , Bei Li , Bingyang Tao , Bole Zhou , Borun Chen , Chao Zhang , Chao Zhang , Chengcheng Han , Chenhui Yang , Chi Zhang , Chong Peng , Chuyu Zhang , Cong Chen , Fengcun Li , Gang Xu , Guoyuan Lin , Hao Jiang , Hao Liang , Haomin Fu , Haoxiang Ma , Hong Liu , Hongyan Hao , Hongyin Tang , Hongyu Zang , Hongzhi Ni , Hui Su , Jiahao Liu , Jiahuan Li , Jialin Liu , Jianfei Zhang , Jianhao Xu , Jianing Wang , Jiaqi Sun , Jiaqi Zhang , Jiarong Shi , Jiawei Yang , Jingang Wang , Jinrui Ding , Jun Kuang , Jun Xu , Ke He , Kefeng Zhang , Keheng Wang , Keqing He , Li Wei , Liang Shi , Lin Qiu , Lingbin Kong , Lingchuan Liu , Linsen Guo , Longfei An , Mai Xia , Meng Zhou , Mengshen Zhu , Peng Pei , Pengcheng Jia , Qi Gu , Qi Guo , Qiong Huang , Quan Chen , Quanchi Weng , Rongxiang Weng , Ruichen Shao , Rumei Li , Shanglin Lei , Shuai Du , Shuaikang Liu , Shuang Zhou , Shuhao Hu , Siyu Xu , Songshan Gong , Tao Liang , Tianhao Hu , Wei He , Wei Shi , Wei Wang , Wei Wu , Wei Zhuo , Weifeng Tang , Wenjie Shi , Wenlong Zhu , Xi Su , Xiangcheng Liu , Xiangyu Xi , Xiangzhou Huang , Xiao Liu , Xiaochen Jiang , Xiaowei Shi , Xiaowen Shi , Xiaoyu Li , Xin Chen , Xinyue Zhao , Xuan Huang , Xuemiao Zhang , Xuezhi Cao , Xunliang Cai , Yajie Zhang , Yang Chen , Yang Liu , Yang Liu , Yang Zheng , Yaoming Wang , Yaqi Huo , Yerui Sun , Yifan Lu , Yiyang Li , Youshao Xiao , Yuanzhe Lei , Yuchen Xie , Yueqing Sun , Yufei Zhang , Yuhuai Wei , Yulei Qian , Yunke Zhao , Yuqing Ding , Yuwei Jiang , Zhaohua Yang , Zhengyu Chen , Zhijian Liu , Zhikang Xia , Zhongda Su , Ziran Li , Ziwen Wang , Ziyuan Zhuang , Zongyu Wang , Zunyuan Yang

We present M2-omni, a cutting-edge, open-source omni-MLLM that achieves competitive performance to GPT-4o. M2-omni employs a unified multimodal sequence modeling framework, which empowers Large Language Models(LLMs) to acquire comprehensive…

We introduce InteractiveOmni, a unified and open-source omni-modal large language model for audio-visual multi-turn interaction, ranging from 4B to 8B parameters, designed to lead the field of lightweight models by offering comprehensive…

We introduce LongCat-Flash, a 560-billion-parameter Mixture-of-Experts (MoE) language model designed for both computational efficiency and advanced agentic capabilities. Stemming from the need for scalable efficiency, LongCat-Flash adopts…

Computation and Language · Computer Science 2025-09-22 Meituan LongCat Team , Bayan , Bei Li , Bingye Lei , Bo Wang , Bolin Rong , Chao Wang , Chao Zhang , Chen Gao , Chen Zhang , Cheng Sun , Chengcheng Han , Chenguang Xi , Chi Zhang , Chong Peng , Chuan Qin , Chuyu Zhang , Cong Chen , Congkui Wang , Dan Ma , Daoru Pan , Defei Bu , Dengchang Zhao , Deyang Kong , Dishan Liu , Feiye Huo , Fengcun Li , Fubao Zhang , Gan Dong , Gang Liu , Gang Xu , Ge Li , Guoqiang Tan , Guoyuan Lin , Haihang Jing , Haomin Fu , Haonan Yan , Haoxing Wen , Haozhe Zhao , Hong Liu , Hongmei Shi , Hongyan Hao , Hongyin Tang , Huantian Lv , Hui Su , Jiacheng Li , Jiahao Liu , Jiahuan Li , Jiajun Yang , Jiaming Wang , Jian Yang , Jianchao Tan , Jiaqi Sun , Jiaqi Zhang , Jiawei Fu , Jiawei Yang , Jiaxi Hu , Jiayu Qin , Jingang Wang , Jiyuan He , Jun Kuang , Junhui Mei , Kai Liang , Ke He , Kefeng Zhang , Keheng Wang , Keqing He , Liang Gao , Liang Shi , Lianhui Ma , Lin Qiu , Lingbin Kong , Lingtong Si , Linkun Lyu , Linsen Guo , Liqi Yang , Lizhi Yan , Mai Xia , Man Gao , Manyuan Zhang , Meng Zhou , Mengxia Shen , Mingxiang Tuo , Mingyang Zhu , Peiguang Li , Peng Pei , Peng Zhao , Pengcheng Jia , Pingwei Sun , Qi Gu , Qianyun Li , Qingyuan Li , Qiong Huang , Qiyuan Duan , Ran Meng , Rongxiang Weng , Ruichen Shao , Rumei Li , Shizhe Wu , Shuai Liang , Shuo Wang , Suogui Dang , Tao Fang , Tao Li , Tefeng Chen , Tianhao Bai , Tianhao Zhou , Tingwen Xie , Wei He , Wei Huang , Wei Liu , Wei Shi , Wei Wang , Wei Wu , Weikang Zhao , Wen Zan , Wenjie Shi , Xi Nan , Xi Su , Xiang Li , Xiang Mei , Xiangyang Ji , Xiangyu Xi , Xiangzhou Huang , Xianpeng Li , Xiao Fu , Xiao Liu , Xiao Wei , Xiaodong Cai , Xiaolong Chen , Xiaoqing Liu , Xiaotong Li , Xiaowei Shi , Xiaoyu Li , Xili Wang , Xin Chen , Xing Hu , Xingyu Miao , Xinyan He , Xuemiao Zhang , Xueyuan Hao , Xuezhi Cao , Xunliang Cai , Xurui Yang , Yan Feng , Yang Bai , Yang Chen , Yang Yang , Yaqi Huo , Yerui Sun , Yifan Lu , Yifan Zhang , Yipeng Zang , Yitao Zhai , Yiyang Li , Yongjing Yin , Yongkang Lv , Yongwei Zhou , Yu Yang , Yuchen Xie , Yueqing Sun , Yuewen Zheng , Yuhuai Wei , Yulei Qian , Yunfan Liang , Yunfang Tai , Yunke Zhao , Zeyang Yu , Zhao Zhang , Zhaohua Yang , Zhenchao Zhang , Zhikang Xia , Zhiye Zou , Zhizhao Zeng , Zhongda Su , Zhuofan Chen , Zijian Zhang , Ziwen Wang , Zixu Jiang , Zizhe Zhao , Zongyu Wang , Zunhai Su

We introduce LongCat-Flash-Thinking-2601, a 560-billion-parameter open-source Mixture-of-Experts (MoE) reasoning model with superior agentic reasoning capability. LongCat-Flash-Thinking-2601 achieves state-of-the-art performance among…

Artificial Intelligence · Computer Science 2026-02-03 Meituan LongCat Team , Anchun Gui , Bei Li , Bingyang Tao , Bole Zhou , Borun Chen , Chao Zhang , Chao Zhang , Chen Gao , Chen Zhang , Chengcheng Han , Chenhui Yang , Chuyu Zhang , Cong Chen , Cunguang Wang , Daoru Pan , Defei Bu , Dengchang Zhao , Di Xiu , Dishan Liu , Dongyu Ru , Dunwei Tu , Fan Wu , Fengcheng Yuan , Fengcun Li , Gang Xu , Guanyu Wu , Guoyuan Lin , Haibin Wang , Hansi Yang , Hao Yang , Haonan Yan , Haoxiang Ma , Haoxing Wen , Hongyan Hao , Hongyin Tang , Hongyu Zang , Hongzhi Ni , Hui Su , Jiacheng Zhang , Jiahong Zhou , Jiahuan Li , Jiaming Wang , Jian Yang , Jianfei Zhang , Jianhao Xu , Jianing Wang , Jiapeng Zhu , Jiaqi Sun , Jiarong Shi , Jiarui Zhao , Jingang Wang , Jinluan Yang , Jinrui Ding , Jinwei Xiao , Jiyuan He , Juncan Xu , Kefeng Zhang , Keheng Wang , Li Wei , Lianhui Ma , Lin Qiu , Lingbing Kong , Lingchuan Liu , Linsen Guo , Mengshen Zhu , Mengxia Shen , Mingyang Zhu , Peiguang Li , Peng Pei , Peng Zhao , Pengcheng Jia , Pengtao Zhang , Ping Liu , Qi Gu , Qiong Huang , Qiyuan Duan , Quanchi Weng , Rongxiang Weng , Rongzhi Zhang , Rumei Li , Shanglin Lei , Shengnan An , Shijun Dai , Shizhe Wu , Shuaikang Liu , Shuang Zhou , Shuo Wang , Songyuan Zhao , Tao Liang , Tianhao Hu , Tianze Chen , Wei Liu , Wei Shi , Wei Wang , Weifeng Tang , Wenjie Shi , Wenlong Zhu , Wentao Chen , Wentao Shi , Xi Su , Xiandi Ma , Xiangcheng Liu , Xiangyu Xi , Xiangyuan Liu , Xiangzhou Huang , Xiao Liu , Xiaodong Cai , Xiaolong Chen , Xiaowei Shi , Xiaoyu Li , Xin Chen , Xingchen Liu , Xuan Huang , Xuezhi Cao , Xunliang Cai , Yan Chen , Yang Bai , Yang Liu , Yang Yang , Yang Zheng , Yanyu Chen , Yaoming Wang , Yaoming Zhu , Yaorui Shi , Yaqi Huo , Yerui Sun , Yi Zhang , Yi-Kai Zhang , Yifan Lu , Yifan Zhao , Yihao Chen , Yitao Zhai , Yongjing Yin , Yongwei Zhou , Youshao Xiao , Yu Wang , Yu Yang , Yuchen Xie , Yuchen Yu , Yuchuan Dai , Yue Xu , Yueqing Sun , Yufei Zhang , Yuhuai Wei , Yulei Qian , Yunfan Liang , Yunke Zhao , Yuwei Jiang , Yuxin Bian , Yuxin Chen , Yuxin Liu , Zeyang Yu , Zhao Yang , Zhengsheng Huang , Zhengyu Chen , Zhijian Liu , Zhikang Xia , Zhimin Lin , Zhiyuan Yao , Zhuofan Chen , Zhuowen Han , Zijian Zhang , Ziran Li , Ziwen Wang , Ziyuan Zhuang

We present MGM-Omni, a unified Omni LLM for omni-modal understanding and expressive, long-horizon speech generation. Unlike cascaded pipelines that isolate speech synthesis, MGM-Omni adopts a "brain-mouth" design with a dual-track,…

Sound · Computer Science 2025-09-30 Chengyao Wang , Zhisheng Zhong , Bohao Peng , Senqiao Yang , Yuqi Liu , Haokun Gui , Bin Xia , Jingyao Li , Bei Yu , Jiaya Jia

The emergence of GPT-4o-like large multimodal models (LMMs) has raised the exploration of integrating text, vision, and speech modalities to support more flexible multimodal interaction. Existing LMMs typically concatenate representation of…

Artificial Intelligence · Computer Science 2025-06-24 Shaolei Zhang , Shoutao Guo , Qingkai Fang , Yan Zhou , Yang Feng

We introduce OmChat, a model designed to excel in handling long contexts and video understanding tasks. OmChat's new architecture standardizes how different visual inputs are processed, making it more efficient and adaptable. It uses a…

Computer Vision and Pattern Recognition · Computer Science 2024-07-09 Tiancheng Zhao , Qianqian Zhang , Kyusong Lee , Peng Liu , Lu Zhang , Chunxin Fang , Jiajia Liao , Kelei Jiang , Yibo Ma , Ruochen Xu

We introduce Baichuan-Omni-1.5, an omni-modal model that not only has omni-modal understanding capabilities but also provides end-to-end audio generation capabilities. To achieve fluent and high-quality interaction across modalities without…

As the foundational component of versatile AI applications, training an multimodal large language model (MLLM) relies on multimodal datasets with dynamic modality mixture proportions and sample length distributions. However, existing MLLM…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-12 Chunyu Xue , Yangrui Chen , Jianyu Jiang , Ningxin Zheng , Junda Feng , Jingji Chen , Shixiong Zhao , Shen Yan , Yi Lin , Lei Shi , Zanbo Wang , Lishu Luo , Faming Wu , Haibin Lin , Xin Liu , Yanghua Peng , Quan Chen

Next-generation multimodal foundation models capable of any-to-any cross-modal generation and multi-turn interaction will serve as core components of artificial general intelligence systems, playing a pivotal role in human-machine…

Computation and Language · Computer Science 2025-10-17 Run Luo , Xiaobo Xia , Lu Wang , Longze Chen , Renke Shan , Jing Luo , Min Yang , Tat-Seng Chua

Recent progress in multimodal large language models (MLLMs) has brought AI capabilities from static offline data processing to real-time streaming interaction, yet they still remain far from human-level multimodal interaction. The key…

Video generation is a critical pathway toward world models, with efficient long video inference as a key capability. Toward this end, we introduce LongCat-Video, a foundational video generation model with 13.6B parameters, delivering strong…

Computer Vision and Pattern Recognition · Computer Science 2025-10-29 Meituan LongCat Team , Xunliang Cai , Qilong Huang , Zhuoliang Kang , Hongyu Li , Shijun Liang , Liya Ma , Siyu Ren , Xiaoming Wei , Rixu Xie , Tong Zhang

Recent advancements in omnimodal learning have significantly improved understanding and generation across images, text, and speech, yet these developments remain predominantly confined to proprietary models. The lack of high-quality…

Computation and Language · Computer Science 2025-09-24 Run Luo , Ting-En Lin , Haonan Zhang , Yuchuan Wu , Xiong Liu , Min Yang , Yongbin Li , Longze Chen , Jiaming Li , Lei Zhang , Xiaobo Xia , Hamid Alinejad-Rokny , Fei Huang

Although Multimodal Large Language Models (MLLMs) demonstrate strong omni-modal perception, their ability to forecast future events from audio-visual cues remains largely unexplored, as existing benchmarks focus mainly on retrospective…

Computation and Language · Computer Science 2026-01-21 Qian Chen , Jinlan Fu , Changsong Li , See-Kiong Ng , Xipeng Qiu

The rapid advancement of multi-modal language models (MLLMs) like GPT-4o has propelled the development of Omni language models, designed to process and proactively respond to continuous streams of multi-modal data. Despite their potential,…

Computer Vision and Pattern Recognition · Computer Science 2025-04-01 Yuxuan Wang , Yueqian Wang , Bo Chen , Tong Wu , Dongyan Zhao , Zilong Zheng

We introduce LongCat-Image, a pioneering open-source and bilingual (Chinese-English) foundation model for image generation, designed to address core challenges in multilingual text rendering, photorealism, deployment efficiency, and…

Computer Vision and Pattern Recognition · Computer Science 2025-12-09 Meituan LongCat Team , Hanghang Ma , Haoxian Tan , Jiale Huang , Junqiang Wu , Jun-Yan He , Lishuai Gao , Songlin Xiao , Xiaoming Wei , Xiaoqi Ma , Xunliang Cai , Yayong Guan , Jie Hu

Recent advances in large language models, particularly following GPT-4o, have sparked increasing interest in developing omni-modal models capable of understanding more modalities. While some open-source alternatives have emerged, there is…

Computer Vision and Pattern Recognition · Computer Science 2025-06-04 Zuyan Liu , Yuhao Dong , Jiahui Wang , Ziwei Liu , Winston Hu , Jiwen Lu , Yongming Rao

Recent advancements in multimodal large language models (MLLMs) have aimed to integrate and interpret data across diverse modalities. However, the capacity of these models to concurrently process and reason about multiple modalities remains…

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