Kalshi once paid a roster of Yale debate champions to bulletproof the wording of its prediction market contracts. Now an AI named Harrison does much of the heavy lifting.
That AI runs on Anthropic's Claude model, and it helped power the exchange's biggest month on record. Kalshi cleared nearly $18 billion in notional volume in May, per Dune Analytics data, then broke a weekly record with $5.1 billion in the first week of the 2026 World Cup.
Co-founder Luana Lopes Lara said an AI engineer on the markets team uses Harrison to battle-test the entire certification process, hunting for holes before a contract goes live.
Kalshi's $1 billion Series F in May valued the exchange at $22 billion.
The Two Words That Cost Traders
Contract language has tripped up the industry before. Kalshi once resolved a market on whether a Netflix Inc. (NASDAQ: NFLX) executive would say "Warner Bros." on a January earnings call to "no," because the executive reportedly said "Warner Brothers" instead.
The company now keeps more than 500 vetted market templates, and Harrison suggests which one fits a new event while flagging issues worth a second look.
New listings still require two people plus a one-to-two hour review window, with a paid bounty for anyone who spots a flaw.
Why Smarter Markets Are A Survival Issue
The pressure to list sharper markets is mounting.
Robinhood Markets (NASDAQ: HOOD) is running its 2026 World Cup contracts through Rothera, a CFTC-licensed exchange and clearinghouse that Robinhood and Susquehanna International Group invested in last year through a joint venture.
Robinhood still routes complex props through Kalshi, but steering flagship events like the World Cup to Rothera chips away at Kalshi's share of that retail flow, which makes Harrison's edge in listing better markets more vital.
How Traders Can Play The Prediction Market Boom
Kalshi and Anthropic are both private, so there is no clean way to own either directly. HOOD is the most direct public proxy, with its World Cup contracts running on Rothera and complex props still on Kalshi.
Traders also watch Intercontinental Exchange (NYSE: ICE), which has backed Polymarket, and DraftKings Inc. (NASDAQ: DKNG) as the incumbent most exposed to the shift.