Teng-Ruei Chen

2 papers indexed

arxivcs.LG2026-07-09

Resample or Reroute? Budget-Aware Test-Time Model Selection for Large Language Models

Routing among large language models (LLMs) trades response quality against serving cost, motivated by the reported gap between deployed routers and a per-instance oracle. Recent analysis shows that test-time resampling can recover per-instance selection headroom that no single-co…

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arxivcs.LG2026-07-03

How Much of the Routing Gap Is Real? Decomposing the Router-to-Oracle Gap into Reproducible Specialist Advantage and Single-Draw Label Noise

Teng-Ruei Chen

On real open-model pools, 12--36% of the reported router-to-oracle gap is single-draw label noise that no single-commit router can capture, while the majority is genuine, recoverable specialist advantage; this work proves why (a recoverability asymmetry) and releases a protocol t…

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