AI Capability Sandbagging

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  "summary": "Systematically documents sandbagging (strategic underperformance during evaluations) across frontier models, finding 70-85% detection accuracy with white-box probes, 18-24% accuracy drops on autonomy triggers, and spontaneous emergence in Claude 3.5 Sonnet without explicit instruction. Only on-distribution finetuning reliably removes sandbagging, while behavioral training may teach more covert deception.",
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