Buffalo Bills vs New England Patriots

Start with the conditions, because they are the one thing about this game we can measure historically. Across 14 New England home games in December since 2015, the median kickoff temperature was 36°F with 6 mph of wind, and 86% of them were at or below 40°F — the coldest in the sample read 13°F. Our model prices none of that: it sees +5.4 for the Patriots, +4.2 for the Bills, and lands on the Patriots by 3.5 (61%). Weather is an argument you add to that number, not one already inside it.

The sharpest unit gap in the game runs one way: the Patriots offense grades +3.9 (4th of 32) against a Bills defense at -0.2 (11th) — 4.1 points of separation on our scale, and the single biggest reason the line sits where it does. Going the other direction, the Bills offense (+4.0, 2nd) meets the Patriots defense (+1.3, 6th), a 2.7-point gap.

Season-long, the model can barely split them: 11.0 projected wins for the Patriots against 10.3 for the Bills, favored in 15 and 13 of their 17 respectively. Two teams heading for the same neighborhood in the standings tend to produce exactly this kind of line. This game sits 8th-hardest on the Patriots' schedule and 2nd-hardest on the Bills'.

On the standings side, AFC East games are the ones that decide the tiebreakers. Head-to-head record is the first tiebreaker between two teams in the same division, and division record is the next — so the value of this result is not just the win column. They already played in Week 4, so a season sweep is on the table here on the AFC East race.

One team has owned this series: the Patriots are 36-12 in 48 regular-season meetings since 2002. They have also met 1 time in the playoffs. They last met in 2025: Bills won 35-31 in December. Over their last 4 meetings the Patriots are 2-2. Worth saying plainly — the model does not know any of that. It reads 2026 ratings and nothing else, so a lopsided series is a story, not a number on this page.

Does the model earn this number? In 666 of the 3266 walk-forward games it has been graded on (2013-2024, no market line used), it landed in the 60-65% range. Those favourites went 59%. The 61% on the Patriots here sits in that same band, and the history runs slightly behind the claim.

Kalshi has not listed KXNFLGAME-26DEC06BUFNE, so there is no price on the board and no edge to quote. The model's number to hold it to: Patriots 61%, Bills 39%. Applying our five-point threshold, that makes Patriots contracts a buy at 56c or below and Bills contracts a buy at 34c or below — anything between is inside the noise, and we pass. Week 1's KXNFLGAME contracts opened in May 2026 and the rest of the slate lists as the season gets closer; this page picks up the price automatically when it does.

Full division picture on the AFC East hub.

Prediction markets are not sportsbooks — you trade a contract that settles at $1 or $0, not a wager against a house line. Informational only; trade responsibly.