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Yefei Chen

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Jul 2026

BLADE: Boundary-Expanded and Layer-Adaptive Dynamic Exit for Efficient LLM Reasoning

A lightweight framework that dynamically terminates reasoning by estimating whether the generated prefix is sufficient for correct answering and derives robust training labels through repeated answer completions is presented, demonstrating an effective approach to more efficient LLM reasoning.

Keshu Fu, Ke-Qin Peng, Jun Bai et al. · 0 citations
Preprint Aug 2026

UpgradeBench: A Decision-Centric Benchmark for Upgrading Fine-Tuned LLM Specialists

This work presents UpgradeBench, a decision-driven longitudinal benchmark covering four consecutive Qwen releases, one continuation checkpoint, six tasks, and two model sizes, augmented by OLMo checkpoints with known training lineage, and disentangles three core questions: whether a new checkpoint improves fixed-recipe...

Yefei Chen, Wei-Ning Zhang · 0 citations
Review Aug 2026

No Judgment Without a Reason: Counterfactual Receipts for Versioned AI Evaluators

This work formalizes evaluator reasoning accountability via three core sources: grounds, norms, and authority, and defines judgment receipts as minimal source replacement sets that reproduce revised verdicts to explain judgment transitions.

Yefei Chen, Wei-Ning Zhang · 0 citations

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