Calibration
AA-Omniscience Accuracy → GPQA Diamond
GPQA Diamond is estimated from AA-Omniscience Accuracy with a Michaelis–Menten curve fitted on 43 models measured on both: y = 0.9883·x / (0.03594 + x), R² = 0.54, cross-validated error 3.8 pp. It is used for 0 estimates.