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The First Token Is Not the Verdict: Hidden Costs of Reading LLM Judges Without Generating

Villuri, Gnaneswar et al.
arXiv (All) · Papers
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computation-and-language
Reading an LLM judge's verdict from the logits of its first generated token is cheap, requires no generation, and is exactly what constrained decoding and likelihood-scoring evaluation harnesses produce. We show that this readout distorts position bias in one direction: it overstates it in every con
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