I am a first-year Ph.D. student at Seoul National University, working with Prof. Gunhee Kim. I am also a visiting researcher at Stanford University, hosted by Prof. Chelsea Finn. Previously, I received my Bachelor's degree with honors in Computer Science and Engineering at 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 has grown into the research question I want to pursue: how should models interact with external knowledge? I want to explore what should be memorized versus externalized, how models retrieve and reason over external knowledge, and how memory should be organized. These interests draw me to information retrieval, RAG, and agent memory.

In parallel, I enjoy abstracting thoughts and mapping their relationships into my own language. For me, conversation serves as a medium for interpreting others’ mental models and discovering new axes of thinking. You can find more of these reflections on my Blog.

Publication

MULTI3IR: A Benchmark for Multi-perspective Multi-domain Multi-modal Information Retrieval

Seokwon Song, Sohyeon Kim, Gunhee Kim
EMNLP 2026  Paper

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
COLM 2026 Workshop on Agent Behavior  Paper

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  Paper  Project Page

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  Paper