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Reward hacking and sandbagging are adequately explained.","excerpt":"o4-mini achieved the highest performance recorded, primarily owing to exceptional performance on one of the five environments used in this evaluation."},{"dimension":"date","status":"pass","explanation":"The original publication instant is 2025-04-16T07:00Z, and the reading's April 16, 2025 matches that UTC calendar day. The evidence is a publisher page, so no archive disclosure is required. There is no hindsight framing, and no later events are presented.","excerpt":null},{"dimension":"support","status":"pass","explanation":"Each claim matches the source: the HCAST point estimates, o3's weaker RE-Bench result, and the reuse of the reference answer and timing tampering. Also supported are the handling of failures and the 'well beyond expert performance' counterfactual. The sandbagging plausibility statement keeps METR's current estimate, and the claims about no internal reasoning and no elicitation match the source. 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