Arizona Cardinals vs San Francisco 49ers
Updated · model ratings
Sunday, September 27, 2026 · Levi's Stadium, Santa Clara, CA
Quick Answer
As of September 1, 2026, our model favors the 49ers by 7.5 in Arizona Cardinals vs San Francisco 49ers, NFL Week 3 2026 — 65% to win, and the 16th-widest model gap in Week 3. Kalshi has not listed KXNFLGAME-26SEP27ARISF yet, so there is no price to compare: when it opens, 49ers at 60c or below (or Cardinals at 30c or below) is where the model would take a position.
ARI
-3.7
SF
+1.0
Kalshi hasn't priced this game yet. Get the full Week 3 card free and you'll have our number in hand the morning it opens.
No spam. Unsubscribe anytime.
Cardinals
35%
model win prob
49ers
65%
model win prob
Run this matchup yourself → Full PWR board for all 32 → Player prop gaps for this game →
28%
Madden 27
72%
Madden 27
KXNFLGAME-26SEP27ARISF hasn't opened yet, so there is no price to compare. When it does, the model buys the 49ers at 60c or below, or the Cardinals at 30c or below — a five-point threshold either way. The market column fills in automatically.
Preseason offer
Gridiron Edge Pro — 50% off your first payment
Pro is the layer around the free game edges: model win probability against the live Kalshi price on every market, edge alerts in Discord the moment a gap opens, and the full win-total, championship and projection boards.
$75 for the first year, or $7.50 for the first month. Code applies automatically. Ends Sep 10.
Every signal graded in public, losers left on the board. See the record →
Power-rating comparison
Season outlook
10,000 simulated seasons on our preseason power ratings — real NFL tiebreakers, real 2026 schedule, no injuries or market prices. How it works →
Why the model has the 49ers by 7.5
The model does not think this one is close. The 49ers rate 14th of 32 at +1.0, the Cardinals 30th at -3.7, and once home field is applied the line lands on the 49ers by 7.5 — 65% to win. That is the 16th-widest gap among the 16 games on the Week 3 board. A preseason rating spread this size is not a promise: it says nothing about turnovers, health, or a defense that shows up different than last year. What it does say is that the Cardinals need the price to be wrong, not the matchup.
The sharpest unit gap in the game runs one way: the 49ers offense grades +3.1 (6th of 32) against a Cardinals defense at -2.9 (30th) — 6.1 points of separation on our scale, and the single biggest reason the line sits where it does. Going the other direction, the Cardinals offense (-0.7, 22nd) meets the 49ers defense (-3.0, 31st), a 2.3-point gap. Special teams adds to it: the 49ers grade +0.9, 4th in the league, against -0.1 (30th) on the other side — close to a point of hidden margin.
Zoom out to the full season and the model projects the 49ers at 8.9 wins (favored in 8 of 17) and the Cardinals at 6.5 (favored in 3) — 2.4 wins apart across the year. By win probability this is the 16th-hardest game on the 49ers' schedule and the 4th-hardest on the Cardinals'.
On the standings side, NFC West 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 meet again in Week 18, which makes a sweep the outcome with real leverage on the NFC West race.
Recent history, for context only: 48 regular-season meetings since 2002, 26-22 in the 49ers' favour. They last met in 2025: 49ers won 41-22 in November. Over their last 4 meetings the 49ers are 2-2. It is not an input to the line — rosters turn over faster than series records do.
Does the model earn this number? In 448 of the 3266 walk-forward games it has been graded on (2013-2024, no market line used), it landed in the 65-70% range. Those favourites went 68%. The 65% on the 49ers here sits in that same band, and the history backs it.
Kalshi has not listed KXNFLGAME-26SEP27ARISF, so there is no price on the board and no edge to quote. The model's number to hold it to: 49ers 65%, Cardinals 35%. Applying our five-point threshold, that makes 49ers contracts a buy at 60c or below and Cardinals contracts a buy at 30c 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 NFC West 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.
Cardinals vs 49ers on Kalshi
- Kalshi event
- KXNFLGAME-26SEP27ARISF
- Market-implied (49ers)
- not listed yet
- Our model (49ers)
- 65%
- Model vs market
- —
Kalshi opens NFL game markets week by week and has not listed KXNFLGAME-26SEP27ARISF yet, so there is no Kalshi price for this game to quote. When it opens, the model buys the 49ers at 60c or below, or the Cardinals at 30c or below — a five-point threshold either way. The numbers above fill in on their own.
Where Cardinals vs 49ers trades
Each venue’s own price where we have one; Robinhood and Coinbase resell the Kalshi contract. Home-side price shown.
| Venue | 49ers | Trade |
|---|---|---|
| Kalshi | not listed on Kalshi yet — opens week of the game | Trade on Kalshi → |
| Novig | not yet listed on Novig — $25 credit on a $10 deposit through our link | Sign-up offer → |
| Polymarket | no captured price for this game — international book | Sign-up offer → |
| Robinhoodsame Kalshi contract | same Kalshi contract, not listed yet | Open Robinhood → |
| Coinbasesame Kalshi contract | same Kalshi contract, not listed yet | Open Coinbase → |
| DraftKings Predictions | price not available — sign-up offer → | Sign-up offer → |
| FanDuel Predicts | price not available — sign-up offer → | Sign-up offer → |
| Fanatics Markets | price not available — sign-up offer → | Sign-up offer → |
A price under a venue name is that venue’s own; Robinhood and Coinbase list the same Kalshi contract. DraftKings Predictions, FanDuel Predicts and Fanatics Markets run on exchanges we have no price feed for, so they carry an offer and no number. We earn a referral credit or commission when you sign up through these links; it never changes the price or the model. Disclosure.
Cardinals vs 49ers — frequently asked
Who is favored in Cardinals vs 49ers in Week 3?
Our power-rating model favors the 49ers by 7.5 points, a 65% win probability over the Cardinals. The 49ers rate 14th of 32 (+1.0) and the Cardinals 30th (-3.7); Kalshi has not listed KXNFLGAME-26SEP27ARISF yet, so the model line is the only number on the board.
What would it take for the Cardinals to win?
The 7.5-point line comes from a 4.7-point rating gap, and a single-game margin has roughly a 14.4-point standard deviation around it — which is why the Cardinals still project at 35% rather than zero. Their best structural path is the Cardinals defense (-2.9, 30th of 32) holding up. Ratings do not price injuries or turnover luck, which is where most upsets actually come from.
How do you take a position on Cardinals vs 49ers?
The contract will be KXNFLGAME-26SEP27ARISF on Kalshi, a CFTC-regulated exchange open to traders in all 50 states. It has not opened yet; when it does, the model would take the 49ers at 60c or below, or the Cardinals at 30c or below. There is no point spread — you buy a yes or no contract on a team and it settles at $1 or $0.
When and where do the 49ers host the Cardinals?
Arizona Cardinals visit the San Francisco 49ers on Sunday, September 27, 2026 — a Sunday game in NFL Week 3, at Levi's Stadium, Santa Clara, CA.
What does the model project for the 49ers and Cardinals this season?
Across all 17 games the model projects the 49ers at 8.9 wins (favored in 8) and the Cardinals at 6.5 (favored in 3). This game ranks 16th-hardest on the 49ers' schedule and 4th-hardest on the Cardinals', by model win probability.
What are the Kalshi odds for Cardinals vs 49ers?
Kalshi has not listed KXNFLGAME-26SEP27ARISF yet, so there is no Kalshi price for this game — anyone quoting one is quoting something else. Kalshi opens NFL game markets week by week. When it opens, our model would take the 49ers at 60c or below or the Cardinals at 30c or below, off a 7.5-point line.
Can you trade Cardinals vs 49ers on Kalshi?
Yes — as an event contract, not a point spread. Kalshi is a CFTC-regulated exchange open to traders in all 50 states, and the Week 3 game market is KXNFLGAME-26SEP27ARISF. You buy a YES or NO contract on a team between 1c and 99c and it settles at $1 or $0, so the price you pay is the break-even probability. There is no vig baked into a line, and you can exit before kickoff at whatever the market is then paying.
How often does the model win when it is 65% on a team like the 49ers?
68% of the time. Over 3266 walk-forward games from 2013-2024 — trained only on prior seasons, no market line as an input — the model put a team in the 65-70% range 448 times, and those teams won 68% of them. The 49ers at 65% over the Cardinals sit in that band, off a 7.5-point model line. Straight-up across all 3266 graded games the model picked winners at 59.6%, with a Brier score of 0.236 against 0.25 for a coin flip.
Week 1 model card — all 16 games, our number vs the market. Sent Wednesday Sept 9. Free.
No spam. Unsubscribe anytime.
The rematch
They run it back in Week 18. Division games are the pairings the model gets two swings at, and the second line usually moves off what the first one showed. Cardinals–49ers, Week 18 →
More Week 3 matchups
Drafting this month? Same model, fantasy side.
The 2026 projection engine behind these numbers also runs a free fantasy draft desk inside Claude, ChatGPT or Cursor — the ranked board, the best available at your pick, sleepers and busts vs consensus ADP, and a who-do-I-draft call mid-draft. 8 tools, no account.
Open the fantasy draft assistant →Prediction markets carry risk. Contracts can settle at $0. Informational only — not financial advice. Trade responsibly.
More NFL model boards
- Heisman odds 2026 — Kalshi vs Polymarket → — Every contender priced on both exchanges, cheaper venue named, plus Coach Gene’s longshots
- Grok fantasy football — connect the draft desk → — One URL, no key: the grok.com/connectors walkthrough and six prompts
- NFL 2026 Market Guide — the 61-page book → — All 32 teams priced against the market, plus a 153-player draft board
- NFL Player Props vs Kalshi — the edge board → — Our projection vs the live Kalshi prop line, biggest gap first
- Madden 27 ratings vs our model vs the market → — All 32 team ratings, our power ratings, and live win-total prices on one board
- NFL Predictions — every game vs the market → — Free model win probability vs Kalshi on all 18 weeks
- 2026 NFL Win Totals — model vs Kalshi → — All 32 teams: projected wins vs the KXNFLWINS ladder
- NFL Game Edges — where the model disagrees → — Moneyline, spread & total edges vs Kalshi prices
- NFL MVP Edges → — Live MVP market mispricings vs Kalshi KXNFLMVP
- Win Total Futures → — Monte Carlo season wins vs the Kalshi line
- Championship Edges → — Playoff / conference / Super Bowl probabilities
- Kalshi NFL Markets → — How Kalshi prices every NFL market + live edges
- Power Rankings — the model methodology anchor → — All 32 teams on the points-per-game scale
- Fantasy Draft Assistant — the same model, in your AI agent → — Free MCP draft desk: board, best available, sleepers vs ADP, who-do-I-draft
- NFL Model Calibration Ledger — how accurate is it, actually → — The graded record: 59.6% straight up, 0.236 Brier, and hit rate by confidence bucket across 3,266 games
- NFL Power Ratings tool — build your own PWR board → — Adjust the model weights and re-rank all 32 teams on the points-per-game scale
- NFL Win Probability calculator → — Turn any rating gap, spread or moneyline into a calibrated win probability
- NFL Power Ratings vs. the Market — where we disagree → — Our PWR and the rating implied by live Kalshi win-total prices, all 32 teams on one points scale