Written before the game and kept as published. Final: Kansas City Chiefs 3, Seattle Seahawks 20 — the graded call is above.
These two have played 53 times going back through the record we hold, and the modern-era series is 4-2 to the Chiefs since 2002. History is not a handicapping input for us — rosters turn over and the model only reads 2026 ratings — but it is the reason this game gets attention the ratings alone would not justify. The number: +4.1 against +0.4, Seahawks by 5, 63% to win.
The sharpest unit gap in the game runs one way: the Seahawks offense grades +0.6 (14th of 32) against a Chiefs defense at -1.0 (16th) — 1.6 points of separation on our scale, and the single biggest reason the line sits where it does. Going the other direction, the Chiefs offense (+1.3, 12th) meets the Seahawks defense (+2.3, 2nd), a 1.1-point gap. Special teams adds to it: the Seahawks grade +1.1, 1st in the league, against +0.2 (22nd) on the other side — close to a point of hidden margin.
Season-long, the model can barely split them: 10.1 projected wins for the Seahawks against 10.6 for the Chiefs, favored in 14 and 10 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 13th-hardest on the Seahawks' schedule and 1st-hardest on the Chiefs'. Nothing on the Chiefs' schedule projects harder than this one.
On the calendar, the Chiefs are on 7 days and the Seahawks are on 10 days. The Chiefs come in off the Chargers, the Seahawks off the Broncos. Rest measures at about a tenth of a point per day (2013-2025), and the closing line already charges for it, so a normal-week gap is not where an edge comes from.
Conditions are unlikely to be the story: across 8 Seattle home games in October since 2015, the median temperature was 58°F and the median wind 5 mph. That is a neutral-weather profile, which is worth knowing mostly because it removes an excuse from both sides.
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 favorites went 59%. The 63% on the Seahawks here sits in that same band, and the history runs slightly behind the claim.
Kalshi listed this game as KXNFLGAME-26OCT25KCSEA, and the contract has settled now that the game has been played. The last price we archived before kickoff is in the settled-market section on this page; there is no live price and no position left to take.
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.