Cheyon Jin

Hi! I'm a Master's student at HOLI Lab in Seoul National University, under the supervision of Yohan Jo.

My research interest lies in LLM agents, particularly in integrating value learning and tool use. I am interested in building human-interactive agents, combining reasoning, decision-making, and real-world action to bridge the gap between model capabilities and practical deployment.

Email / CV / Google Scholar / LinkedIn

Education

Seoul National University (SNU) Mar. 2021 – Feb. 2025
B.S., Computer Science and Engineering
- CGPA: 4.13/4.3 (3.96/4.0) (Summa Cum Laude)
- Best Thesis Award: "Personalized AI Docent Based on RAG"

Korea Minjok Leadership Academy (KMLA) Mar. 2018 – Feb. 2021
Graduated Valedictorian of the Science Program
- CGPA: 4.0/4.0, Awarded In-school Gifted Student Scholarship for all three years.

Publications

	Emotional Support Evaluation Framework via Controllable and Diverse Seeker Simulator Chaewon Heo, Cheyon Jin, Yohan Jo [ACL-Findings] Findings of the Association for Computational Linguistics: ACL, 2026 arXiv
	Non-Collaborative User Simulators for Tool Agents Jeonghoon Shim, Woojung Song, Cheyon Jin, Seungwon Kook, Yohan Jo [ICLR] The Fourteenth International Conference on Learning Representations, 2026 arXiv
	MM-SCALE: Grounded Multimodal Moral Reasoning via Scalar Judgment and Listwise Alignment Eunkyu Park, Wesley Hanwen Deng, Cheyon Jin, Matheus Kunzler Maldaner, Jordan Wheeler, Jason I. Hong, Hong Shen, Adam Perer, Ken Holstein, Motahhare Eslami, Gunhee Kim arXiv, 2026 arXiv
	Comparing Neighbors Together Makes it Easy: Jointly Comparing Multiple Candidates for Efficient and Effective Retrieval Jonghyun Song, Cheyon Jin, Wenlong Zhao, Andrew McCallum, Jay-Yoon Lee [EMNLP] Empirical Methods in Natural Language Processing, 2024 arXiv

Research Experience

SNU Vision and Learning Lab Mar. 2024 – Jun. 2025
Undergraduate Intern (Advisor: Prof. Gunhee Kim)

Projects
1) Intelligent Docent Service for Information Vulnerable Audiences (09/2024-06/2025)
2) Observation-Behavior-Aware Rewards from Video Language Models (03/2024-08/2024)
3) Paragraph Segmentation Model with LLM Fine-tuning (03/2024-05/2024)

SNU Undergraduate Research Opportunity Program (UROP) Jan. 2024 – Feb. 2024
Participant (Advisor: Prof. Sang-goo Lee)

SNU Structure & Knowledge Injection into Machine Learning Lab Jun. 2023 – Jan. 2024
Undergraduate Intern (Advisor: Prof. Jay-yoon Lee)

Professional Experience

Peex, Seoul, Korea Jan. 2026 – Feb. 2026
Research Intern

IMM Investment, Seoul, Korea Jan. 2023 – Feb. 2023
Research Analyst, Venture Investment Division

NC Soft AI R&D Group, Seoul, Korea Jan. 2022 – Feb. 2022
Intern, Vision AI Lab Human Pose Team

Awards and Honors

Presidential Science Scholarship, Ministry of Science and ICT 2021 – 2025

Grand Prize, The 2nd SNU X Hansot Business Contest Nov. 2023

KMLA Dasan-Award (Ranked #1 in the Science Program) Feb. 2021

National Athlete Nominee, Korean Chemistry Olympiad 2020

Gold Prize, The 33rd Korean Mathematical Olympiad 2019

Grand Prize, The 38th Korean Mathematics Competition High School Group 2018

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