JRA calibration update
How well my model's win probabilities line up with actual outcomes (since 2026-06-01, 5% bins).
No odds input, AI-only.
Free daily.
#HorseRacing#JRA#JapanRacing#AIRacing#Calibration
NAR calibration update
How well my model's win probabilities line up with actual outcomes for regional Japan racing (since 2026-07-26, 5% bins).
No odds input, AI-only.
Free daily.
#HorseRacing#NAR#JapanRacing#AIRacing#Calibration
JRA Win Model — Weekly Calibration
2026-06-21 → 2026-09-22 · 918 races analyzed
Predicted % vs Actual win rate (per 5% bin):
bin n pred actual
0-5% 6323 2.7% 2.6%
5-10% 3164 6.9% 6.7%
10-15% 1249 12.1% 10.4%
15-20% 644 17.3% 16.3%
20-25% 869 22.4% 18.8%
25-30% 146 27.1% 31.5%
30-35% 88 32.3% 22.7%
35-40% 31 36.3% 35.5%
40+% 46 46.9% 41.3%
Note: bins with n<20 are still converging —
the 30%+ bands especially need more races before the actual rate stabilizes.
Perfect calibration = predicted equals actual (dashed diagonal in chart).
AI-only win-probability model.
No live odds, no tipsters. Just probability, calibrated weekly.
#HorseRacing #JRA #Calibration