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Kohsei Matsutani I am an undergraduate student at the University of Tokyo under the supervision of Prof. Yutaka Matsuo. My research interests center on machine learning, currently focusing on the reasoning capabilities of Large Language Models (LLMs). I am currently interning at Liquid AI. |
Research |
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RL Squeezes, SFT Expands: A Comparative Study of Reasoning LLMs
Kohsei Matsutani, Shota Takashiro, Gouki Minegishi, Takesi Kojima, Yusuke Iwasawa, Yutaka Matsuo Preprint, 2025 arXiv |
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Mixture of Experts Provably Detect and Learn the Latent Cluster Structure in Gradient-Based Learning
Ryotaro Kawata (*), Kohsei Matsutani (*), Yuri Kinoshita, Naoki Nishikawa, Taiji Suzuki * Equal contribution ICML, 2025 arXiv |