NFL Game Prediction System

Live probabilistic forecasting using ensemble predictions (model + Vegas lines)

Updated: November 19, 2025 Model: Ensemble v2.0 (ELO + Momentum + Vegas) Live Weeks 1-14 actual results

Model Summary

Calibration Quality
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Model Configuration
K-Factor 20
Ensemble Weight 50% Model + 50% Vegas
Momentum Window Last 3 games
Weather Adjustments Asymmetric (outdoor advantage)
Data Coverage
2025 Games Completed 207
Weeks Processed 1-14
Historical Training 2020-2024
Last Updated Week 14

Current Week Predictions

Ensemble predictions combining our ELO model (50%) with Vegas betting lines (50%). Model includes: base ELO ratings, 3-game momentum adjustments, home field advantage (+52 points), rest differentials (±40 pts), live weather forecasts (asymmetric outdoor advantage), and injury reports.

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Current Team Rankings

ELO ratings update after each game using margin-of-victory multipliers. Larger margins and upsets produce bigger rating changes. Average team: ~1500.
Rank Team Conference Division ELO Rating Proj. Wins Playoff %

Playoff Probabilities

Based on 10,000 Monte Carlo simulations of remaining 2025 games (Weeks 10-18). Each simulation uses current ELO ratings to determine win probabilities, then projects final standings and playoff seeding.
Team Make Playoffs First-Round Bye Proj. Wins

Model Calibration

A well-calibrated model's predicted probabilities match observed frequencies. Games predicted at 70% should win 70% of the time. This model uses isotonic regression to map raw ELO probabilities to calibrated probabilities. Excellent calibration: error < 5 percentage points per bin.

Probability Bins vs. Actual Win Rate

Predicted Range Games Avg Predicted Actual Win Rate Error Quality

Historical Performance

Week Brier Score Log Loss Accuracy Assessment