collaborators

7 papers

cs.CL2026

Routing Sensitivity Without Controllability: A Diagnostic Study of Fairness in MoE Language Models

Junhyeok Lee, Kyu Sung Choi

Mixture-of-Experts (MoE) language models are universally sensitive to demographic content at the routing level, yet exploiting this sensitivity for fairness control is structurally…

cs.DL2026

citecheck: An MCP Server for Automated Bibliographic Verification and Repair in Scholarly Manuscripts

Junhyeok Lee

Reference lists in scholarly manuscripts frequently contain errors, including incorrect identifiers, incomplete metadata, misattributed authors, and mismatches between preprint and…

cs.AI2025

Motif-2-12.7B-Reasoning: A Practitioner's Guide to RL Training Recipes

Junghwan Lim, Sungmin Lee, Dongseok Kim +23

We introduce Motif-2-12.7B-Reasoning, a 12.7B parameter language model designed to bridge the gap between open-weight systems and proprietary frontier models in complex reasoning a…

cs.CL2025

Motif 2 12.7B technical report

Junghwan Lim, Sungmin Lee, Dongseok Kim +22

We introduce Motif-2-12.7B, a new open-weight foundation model that pushes the efficiency frontier of large language models by combining architectural innovation with system-level…

cs.LG2025

Grouped Differential Attention

Junghwan Lim, Sungmin Lee, Dongseok Kim +7

The self-attention mechanism, while foundational to modern Transformer architectures, suffers from a critical inefficiency: it frequently allocates substantial attention to redunda…

cs.CL2025

Expanding Foundational Language Capabilities in Open-Source LLMs through a Korean Case Study

Junghwan Lim, Gangwon Jo, Sungmin Lee +16

We introduce Llama-3-Motif, a language model consisting of 102 billion parameters, specifically designed to enhance Korean capabilities while retaining strong performance in Englis…