WMDP and the dual-use evaluation stack WMDP: 4,157 yellow-zone MCQs across three domains biosecurity 1,520 questions pathogens, acquisition, synthesis cybersecurity 2,225 questions exploit dev, persistence, C2 chemistry 412 questions schedule-1 precursors the uplift narrative (2024-2025) 2024: "mild uplift" novices benefit modestly vs search April 2025 (OpenAI PF v2): "on the cusp" cusp of meaningfully helping novices 2025 Anthropic: 2.53x bio-acquisition uplift insufficient to rule out ASL-3 novice-vs-expert decomposition novice-relative uplift multiplicative; high because novices have little WMDP-shaped + acquisition trial measures this expert-absolute capability ceiling of information extractable by motivated expert elicitation-hardened evaluation measures this