Sohyeon Kim

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MS @ SNU
sohyeon.kim@vision.snu.ac.kr

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I am a first-year Ph.D. student at Seoul National University, advised by Prof. Gunhee Kim. Before that, I received my B.S. in CSE from POSTECH in 2025.

I am deeply interested in the limits of the thinking machine and what can and cannot be computed. Can the human mind be simulated by a machine? Currently, I study the interaction between reasoning and knowledge retrieval, with a focus on Retrieval-Augmented Generation through Multi-turn Search-integrated Reasoning and LLM Agents. I am particularly interested in the behavioral patterns and limitations of RL-based LLM agents.

In parallel, I enjoy abstracting thoughts and mapping their relationships into my own language. For me, conversation serves as a medium to interpret others' mental models, allowing me to discover new axes for my thinking.


Education

Seoul National University Sep 2025-Present
  • M.S/Ph.D in AI
  • Pohang University of Science and Technology Feb 2021-Aug 2025
  • B.S. in Computer Science and Engineering
  • Summa Cum Laude
  • Hansung Science High School for the Gifted Mar 2018 - Feb 2021


    Publication

    When Is Enough Not Enough? Illusory Completion in Search Agents
    Dayoon Ko, Jihyuk Kim, Sohyeon Kim, Haeju Park, Dahyun Lee, Gunhee Kim, Moontae Lee, Kyungjae Lee
    Arxiv

    Hybrid Deep Searcher: Scalable Parallel and Sequential Search Reasoning
    Dayoon Ko, Jihyuk Kim, Haeju Park, Sohyeon Kim, Dahyun Lee, Yongrae Jo, Gunhee Kim, Moontae Lee, Kyungjae Lee
    ICLR 2026

    When Should Dense Retrievers Be Updated in Evolving Corpora? Detecting Out-of-Distribution Corpora Using GradNormIR
    Dayoon Ko, Jinyoung Kim, Sohyeon Kim, Jinhyuk Kim, Jaehoon Lee, Seonghak Song, Minyoung Lee, Gunhee Kim
    ACL 2025 Findings [pdf] [code]


    Research Experience

    Vision and Learning Lab, SNU Jan 2025–Aug 2025
    Advised by Prof. Gunhee Kim

    Language and Data Intelligence Lab, SNU Sep 2024–Nov 2024
    Advised by Prof. Seungwon Hwang

    Data Systems Lab, POSTECH Feb 2024–Aug 2024
    Advised by Prof. Wookshin Han


    Work Experience

    Samsung Electronics Inc. Jul 2023–Aug 2023
    Internship at System RnD Team, MX Department