Kalshi vs. Polymarket price gaps
When the same underlying event is listed on both Kalshi and Polymarket but priced differently, the market is telling you something. These pairs are detected by title similarity and sorted by the biggest price disagreement.
How this works: we tokenize every Kalshi and Polymarket market title, remove common words, and compute Jaccard similarity between every cross-platform pair. Pairs with 35%+ word overlap and a 5pp+ price gap are surfaced here.
Why it matters: prediction markets are supposed to price the same event at roughly the same probability regardless of where it's listed. When they don't, it's a signal that either one venue has stale pricing, information is moving through one venue faster than the other, or the contract terms differ in ways the title doesn't reveal.
This is not trading advice. US traders cannot legally use Polymarket, and cross-venue arbitrage involves real execution risk. This page is a research tool , look closely at each pair before drawing conclusions.