Build a model from the stats you actually trust, test it against every NFL game since 1999, and track a record that locks before kickoff. Your read, the crowd’s read, and the gap between them.
You enter the crowd’s number. DeltaBook shows the gap, and stops there.
No code, no spreadsheet. Tell DeltaBook you trust efficiency and rest over turnovers, in plain English, and it builds a model that puts a number on every game that week. Adjust any weight by hand whenever you want.
Backtest your theory over more than 1.2 million plays since 1999, in seconds. The number that matters is calibration: when it says 70 percent, does it hit 70 percent? That is how you tell a real read from a lucky run.
Change a weight, rerun 27 seasons in seconds, and see if v5 scores better than v4. Every version is scored and kept, so your best model is always one click away.
Arm your model and every prediction freezes before the game starts, then grades itself when the game ends. Build a public track record you can put in front of anyone.
Rest and travel matter more than the crowd thinks.
DeltaBook runs as an MCP server, so any MCP client - Claude, ChatGPT, or your own - can build models, run backtests, and read your results directly. Or use the copilot built in. Either way the math stays deterministic: the AI helps you build and understand your model, and never makes the prediction. The engine does that.
The NFL is live first because the season is here. The NBA, soccer, and more run on the same tool, with the same backtesting and the same frozen record.
For less than a coffee a day.
Leave your email and we will tell you the moment it is ready. One message at launch, nothing else.