Will an Anthropic Claude model score at least 55% on Humanity’s Last Exam?

Prediction markets currently give a 4% probability that Will an Anthropic Claude model score at least 55% on Humanity’s Last Exam?. This contract trades at 4¢ on Polymarket, closing June 30, 2026. This market has collapsed from 50¢ to 9¢ over seven days, suggesting either new information about Claude's capabilities or shifting expectations around the exam's difficulty, though the 4,993% implied yield on "Yes" indicates extreme underpricing relative to the binary outcome structure.

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4¢
Bid/Ask 4/5¢·Spread 0¢·Vol $0·OI $4,391.184·Closes Jun 30, 2026·69d remaining
0x1a89ff4d047c52e0e7030e4effd0fd9d98a032da515ab7fff5c2eed82db374ea
7-day price27 snapshots · 15 regime
50¢4¢ current
Apr 162¢Apr 20

Analysis

4d ago

This market has collapsed from 50¢ to 9¢ over seven days, suggesting either new information about Claude's capabilities or shifting expectations around the exam's difficulty, though the 4,993% implied yield on "Yes" indicates extreme underpricing relative to the binary outcome structure. With only $3,924 in open interest and $174 daily volume against a 74-day timeframe, liquidity is dangerously thin, creating potential for sharp reversals if new Claude benchmark results emerge. The 27x volatility ratio and 10/10 cliff risk index suggest this market is highly unstable and may be driven more by sentiment swings than fundamental reassessment of whether Claude can clear a 55% threshold on a specialized exam.

Resolution rules

This market will resolve to "Yes" if the Humanity’s Last Exam leaderboard lists any Anthropic Claude model with a score of at least the specified score by June 30, 2026, 11:59 PM ET. Otherwise, this market will resolve to "No". The resolution source will be the official Humanity’s Last Exam leaderboard https://scale.com/leaderboard/humanitys_last_exam.

Indicators

IY (Yes) 12667.9%
IY (No) 22.0%
Adj IY 6334%
CRI 24
Overround 0.5%
▶ Full indicator table (5)
IndicatorValue
IY (Yes)12667.9%
IY (No)22.0%
Adj IY6334%
CRI24
Overround0.5%

Regime

Label
neutral
Score
0.5
Spread
0¢
Computed
4/21/2026, 8:24:07 PM
Indicators computed 4/21/2026, 8:23:18 PM

Trade

View on polymarketsf trade 0x1a89ff4d047c52e0e7030e4effd0fd9d98a032da515ab7fff5c2eed82db374ea yes 100

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