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Sangmook Lee

3 accepted papers

2026

Confidence-Guided Stepwise Model Routing for Cost-Efficient Reasoning

AAAI 2026technical

Recent advances in Large Language Models (LLMs) - particularly model scaling and test-time techniques - have greatly enhanced the reasoning capabilities of language models at the expense of higher inference costs. To lower inference costs, prior works train router models or deferral mechanisms that

Cited by 0SourcePDFScholar
2025

ReflAct: World-Grounded Decision Making in LLM Agents via Goal-State Reflection

EMNLP 2025

Recent advances in LLM agents have largely built on reasoning backbones like ReAct, which interleave thought and action in complex environments. However, ReAct often produces ungrounded or incoherent reasoning steps, leading to misalignment between the agent’s actual state and goals. Our analysis fi