VenueGap

Kalshi vs Polymarket gap report, 2026-09-30

Matched 492 events (GOP 2028 1, CS2 53, Heisman 1, Dem 2028 1, La Liga 9, NBA title 1, MLS 16, Ballon d'Or 1, BTC high 2026 1, ETH low 2026 1, France 2027 1, NFL MVP 1, Fed 3, Stanley Cup 1, BTC low 2026 1, ETH high 2026 1, CFB 218, WTA 16, WNBA title 1, UCL games 1, LoL 23, NFL 31, NHL 36, Bundesliga 9, UFC 13, UCL 1, WNBA 2, Israel PM 1, Premier League 10, Ligue 1 7, ATP 24, NFL futures 1, World Series 1, MLB 4), $44.1M of 24h volume across both venues. Snapshot 2026-09-30T13:00:39.962Z.

Widest disagreements (upcoming games, two-sided books only)

  1. eternal premium (Counter-Strike: megoshort vs eternal premium (BO3) - CCT Europe Challengers Series Playoffs, Wed, Sep 30, 9:45 AM ET): Kalshi $0.59 vs Polymarket $0.54, Kalshi $0.05 higher
  2. Seahawks (49ers vs. Seahawks, Sun, Oct 11, 4:25 PM ET): Kalshi $0.63 vs Polymarket $0.61, Kalshi $0.02 higher
  3. Lodis (LoL: Colossal Gaming vs Lodis (BO1) - EMEA Masters Swiss Stage, Wed, Sep 30, 10:00 AM ET): Kalshi $0.52 vs Polymarket $0.50, Kalshi $0.02 higher
  4. Washington Mystics (Atlanta Dream vs. Washington Mystics, Wed, Sep 30, 7:00 PM ET): Kalshi $0.40 vs Polymarket $0.42, Polymarket $0.02 higher
  5. Learner Tien (China Open: Learner Tien vs Hubert Hurkacz, Thu, Oct 1, 7:00 AM ET): Kalshi $0.64 vs Polymarket $0.63, Kalshi $0.01 higher
  6. Texans (Cowboys vs. Texans, Sun, Oct 4, 1:00 PM ET): Kalshi $0.57 vs Polymarket $0.56, Kalshi $0.01 higher
  7. Bengals (Jaguars vs. Bengals, Sun, Oct 4, 1:00 PM ET): Kalshi $0.57 vs Polymarket $0.56, Kalshi $0.01 higher
  8. Eagles (Rams vs. Eagles, Sun, Oct 4, 1:00 PM ET): Kalshi $0.41 vs Polymarket $0.40, Kalshi $0.01 higher
  9. Bills (Patriots vs. Bills, Sun, Oct 4, 1:00 PM ET): Kalshi $0.74 vs Polymarket $0.73, Kalshi $0.01 higher
  10. Boston Red Sox (Boston Red Sox vs. New York Yankees, Wed, Sep 30, 8:00 PM ET): Kalshi $0.45 vs Polymarket $0.44, Kalshi $0.01 higher

Cross-venue net edges after fees

None at snapshot time. That is normal; edges appear and close within minutes.

Futures, tournaments and nominations

Which venue was closer to the result

On 2644 settled games, the closing price was closer on Kalshi 890 times (34%) and on Polymarket 780 times (30%), 974 ties. Mean Brier: Kalshi 0.1916, Polymarket 0.1917 (lower is better). Mean gap at close 0.9 pp.

Fed meetings

MeetingBucketKalshiPolymarketGap
Fed Decision in December?50+ bps decrease$0.01$0.00$0.00
Fed Decision in December?25 bps decrease$0.02$0.01+$0.01
Fed Decision in December?No change$0.22$0.25−$0.03
Fed Decision in December?25 bps increase$0.74$0.75−$0.01
Fed Decision in December?50+ bps increase$0.03$0.01+$0.01
Fed Decision in January?50+ bps decrease$0.01$0.02−$0.01
Fed Decision in January?25 bps decrease$0.02$0.04−$0.02
Fed Decision in January?No change$0.45$0.48−$0.02
Fed Decision in January?25 bps increase$0.49$0.47+$0.02
Fed Decision in January?50+ bps increase$0.02$0.02−$0.01
Fed Decision in October?50+ bps decrease$0.01$0.00$0.00
Fed Decision in October?25 bps decrease$0.01$0.00$0.00
Fed Decision in October?No change$0.66$0.66+$0.01
Fed Decision in October?25 bps increase$0.33$0.34−$0.01
Fed Decision in October?50+ bps increase$0.01$0.01$0.00

Traffic yesterday (2026-09-29)

Views 5 · expands 0 · spotlight clicks 0 · embed views 0 · outbound Kalshi 0 · outbound Polymarket 0 · click-through 0%

Method: mid prices, Polymarket from the live order book, Kalshi from its public API. Gap = Kalshi − Polymarket. Not advice. Live screener: https://venuegap.com · Scoreboard: https://venuegap.com/scoreboard · Kalshi vs Polymarket: https://venuegap.com/kalshi-vs-polymarket