# Preprint proposes test for when LLM hidden-state selection beats voting

_Wednesday, August 19, 2026 at 12:00 AM EDT · Science, AI · Latest · Tier 2 — Notable_

A new arXiv preprint reports that CASE, a hidden-state selection method for large language model answers, outperformed majority voting by up to 19 points on medium-difficulty questions and 16.8 points on hard questions. The method trains a linear gate on answer-token hidden states and uses a decodability measure to predict when selection should outperform voting. The paper reports a 0.75 correlation between decodability and accuracy gains on held-out data, while warning that conventional probes can leak question identity.

## Sources

- [cs.AI updates on arXiv.org](https://arxiv.org/abs/2608.17124)

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