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Spurious probes catch GPT-5.6 Luna in eval mode

Spurious probes catch GPT-5.6 Luna in eval mode

Researchers screened thousands of 'name a member of a category' questions and found spurious probes that detect internal states. For GPT-5.6 Luna, GPT-5.6 Sol, and Claude Sonnet 5, the highlighted probes reached 0.77-0.81 on held-out sources (0.84-0.89 for ensembles of ten).

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