Model calibration audit

For every bucket of predicted probability, what did the model actually hit? A well-calibrated model has actual win rate ≈ predicted prob. A negative gap means the model is overconfident in that bucket (dangerous); positive gap means it's underpredicting (safe). Rows turn red when |gap| > 5pp AND N ≥ 10.

Calibration cohort by sport (click to filter):

All sports MLB N=3,254 NCAAF N=960 TENNIS_WTA N=668 TENNIS_ATP N=567 MMA_MIXED_MARTIAL_ARTS N=522 LALIGA N=219 AMERICANFOOTBALL_NFL N=187 SERIEA N=171 EPL N=169 NHL N=162 LIGUE1 N=147 NFL_PRESEASON N=145 BUNDESLIGA N=128 UCL N=71 CRICKET_IPL N=27 NCAAB N=11 NBA N=9

Combined "all sports" is rarely meaningful — sports differ in market efficiency, signal availability, and base rates. Use the chips to drill into a single sport. N<50 (red) means the calibration is brittle; N≥200 (green) is trustworthy.

Filter: window=90d · sport=nba

Overall: N = 9 · mean predicted 56.6% · actual win rate 44.4% · gap -12.1pp · Brier 0.300 · log-loss 0.800

Calibration by predicted-probability bucket.
Predicted-prob bucket	N	Mean predicted	Actual win rate	Gap (actual − predicted)	Brier
50-55%	6	52.0%	50.0%	-2.0pp	0.256
55-60%	1	57.4%	100.0%	+42.6pp	0.181
65-70%	1	68.0%	0.0%	-68.0pp	0.462
70-75%	1	72.0%	0.0%	-72.0pp	0.518

JSON feed · Model CLV · Methodology

Calibration is computed from the prediction_history table. Bucket edges are 5pp wide (50-55%, 55-60%, etc.) with widened tails (<50%, 80-90%, 90%+) where data is sparser. Negative gap is the dangerous direction — actual win rate below stated confidence.