Polymarket vs. Kalshi
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See where the two biggest prediction markets disagree. Pick any two markets, or start from the biggest gaps below: prices, volume, history and the resolution rules, side by side.
Kalshi is 4 points higher than Polymarket (4% vs 0%). Polymarket trades about 291.3× more volume today, so its price has more money behind it. They resolve on different dates (Oct 18 vs Dec 31), so they may not be exactly the same bet.
History starts when we first saw each market, so a newly added market has a short line.
| Polymarket | Kalshi | |
|---|---|---|
| Probability (Yes) | 0% | 4% |
| Change (24h) | -47.5 pt | -0.8 pt |
| Volume today | $466K | $1.6K |
| Total volume | $466K | $617.2K |
| Liquidity | $1.4M | — |
| Open interest | — | $190.8K |
| Resolves | — | 15mo |
| Tracked for | 3 days | 12 days |
Resolution rules: read both before trusting a gap
Polymarket
In the upcoming game, scheduled for October 18, 2026 If Red Bull Bragantino wins, this market will resolve to "Yes". Otherwise, this market will resolve to "No". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve "No". This market refers only to the outcome within the first 90 minutes of regular play plus stoppage time. The primary resolution source for this market is the official statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 2 hours after the event's conclusion, data from Flashscore may be used; if Flashscore data is unavailable, data from Sofascore may be used; if neither is available, a consensus of credible reporting may be used instead. All markets will settle based on the official final result as recognized by the governing body or event organizers. Revisions to officially declared final scores made after market resolution will not be accounted for in determining the outcome. If no acceptable data is available within 24 hours of the event's conclusion, this market will resolve 50-50, or to "Draw" where applicable.
Kalshi
If **ALL** of the following occur: 1. Trump's VoteHub approval rating rises above 48% in 2026 AND 2. Republicans retain control of both the House of Representatives and Senate after the midterms AND 3. U.S. GDP growth is above 5% in any quarter between Q4 2025 and Q4 2026 (inclusive) AND 4. The U.S. unemployment rate (U-3) stays below 5% in 2026 then the market resolves to Yes.
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Informational only — not financial advice. Odds are mirrored from each platform and may lag the live order book.