Polymarket$2.32BOIOpen interest: sum of pool liquidity across all active markets, reported by the Polymarket API.
Kalshi$350.67MOIOpen interest: total contracts outstanding across all active markets, reported by the Kalshi API.
Limitless$18.48MOIOpen interest: estimated from total volume traded (USDC). Limitless does not report a separate OI metric.Compare Zelenskyy and Putin Meet Before 2029 prediction market odds side by side across Polymarket, Kalshi. Platforms currently disagree by an average of 3.2pp, with the largest spread reaching 54.0pp. These price differences can signal arbitrage opportunities or reflect different trader sentiment. With $1.3K in combined trading volume across 17 outcomes, this is one of the notable cross-platform prediction markets.
No meeting before 2027KalshiPolymarketCost: 46¢ per pair → pays $1 at resolution. Gross spread 54.0pp before fees.
View all arbs| Outcome | Polymarket | Kalshi | Spread |
|---|---|---|---|
B Before Jan 20, 2029 | - | 57%±0 | - |
No meeting before 2027 | 76%+1.0 | 22%±0 | 54.0pp spread |
B Before July 2026 | - | 8%+1.0 | - |
 US | 3%— | - | - |
 Hungary | 3%±0 | - | - |
 Qatar / UAE | 2%±0 | - | - |
 Turkey | 2%±0 | - | - |
 Saudi Arabia | 2%±0 | - | - |
 Russia | 1%±0 | - | - |
 Switzerland | 1%±0 | - | - |
B Before February 2026 | - | 1%±0 | - |
 Ukraine | 1%±0 | - | - |
 China | 1%±0 | - | - |
 Belarus | 1%±0 | - | - |
 India | 1%— | - | - |
 Italy / Vatican | 0%±0 | - | - |
 Kazakhstan | 0%±0 | - | - |
