I am a first-year M.S./Ph.D. student at Seoul National University, advised by Gunhee Kim. Previously, I received my B.S. in Computer Science and Engineering from POSTECH.

Throughout my life, I’ve been thinking about what I want, what I know, and how to explore what I do not know. This curiosity extends into my research: how knowledge is stored, retrieved, and leveraged during reasoning. I am particularly interested in non-parametric memory systems, including RAG, information retrieval, and agent memory. Currently, I explore how models can leverage existing knowledge to discover the unknown.

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 thinking. Reading has also been a source of inspiration for me, and lately I've been marveling at the imagination of Asimov, P. K. Dick, and Clarke. Just as they explored futures unbound by their present, I hope to push the limits of intelligence.

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