Trade: OpenAI GPT score on Humanity’s Last Exam by June 30?

Market context

Humanity's Last Exam is a benchmark developed by Scale AI designed to test frontier AI capabilities across domains requiring deep reasoning and specialised knowledge. The leaderboard tracks performance of various large language models, with OpenAI's GPT models historically among the top performers. This market settles based on whether any OpenAI GPT variant achieves a specified score threshold by end of June 2026, with the official Scale leaderboard serving as the resolution source.

The current 53% implied probability reflects uncertainty around both model capability progression and the specific performance bar being tested. GPT-4 and its variants have consistently ranked highly on comparable benchmarks—including MMLU, ARC, and other reasoning-heavy evaluations—though performance ceilings vary significantly by domain. Historical precedent suggests OpenAI typically releases updated models annually, with incremental capability gains of 3–8 percentage points on standardised tests. The probability assignment suggests traders view the threshold as moderately challenging but achievable within the timeframe.

Key catalysts include any OpenAI model announcements between now and June 2026, particularly releases of GPT-5 or successor versions. Scale AI may also update the benchmark itself or publish interim leaderboard results, which could shift market expectations. The order book on Polymarket currently reflects balanced positioning, with the 53% probability indicating genuine disagreement about whether OpenAI's development trajectory will clear the specified bar. Traders should monitor both OpenAI's stated roadmap and competing model performance on Humanity's Last Exam, as relative capability gaps often narrow faster than absolute scores improve.

How this market resolves

Resolution is handled by the UMA optimistic oracle on Polygon. A proposer submits the outcome, a two-hour dispute window opens, and if no one stakes a counter-claim the payout is final. Contested outcomes escalate to UMA token-holder voting. Payouts clear in USDC to the winning side.

How to trade this market step by step

The mechanics for trading "OpenAI GPT score on Humanity’s Last Exam by June 30?" are the same as any other PolyGram event contract. Each YES share resolves to $1 if the event happens, or $0 if it doesn't. The current price between 0¢ and 100¢ is the market's probability estimate, set live by the order book.

1. Sign in on polygram.ink with your email — no full KYC under $1,500 lifetime trading volume.
2. Deposit USDC on Polygon (lowest fees, ~$0.01 per transaction) or Ethereum. Funds credit after 12 confirmations.
3. Pick a side. Buy YES if you believe the event will happen; buy NO if you think it won't. The current YES price reflects the market's collective probability.
4. Size your position. If you stake 100 USDC at 50% YES, you'll receive shares that pay $200 if YES resolves true — a 100% gross return. If NO resolves, your shares are worth $0.
5. Set risk controls (optional). Stop-loss, take-profit, and limit-order types all supported. Use the trade ticket's slippage box to cap your maximum entry price.
6. Wait for resolution. When the event resolves on-chain via the UMA optimistic oracle, the winning side settles to 100¢ automatically and USDC hits your balance within seconds. Withdrawable to any wallet you control.

How active is this market?

$23K in lifetime turnover and $623 of resting liquidity puts this market in the around the median by volume for chatgpt contracts on PolyGram. Order-book depth is thin — large orders may need to be split across the book or executed as limit orders.

Last 24 hours alone saw $278 in turnover, consistent with the market's lifetime daily-average pace.

The market has been open for 3 months — the price has had time to stabilise as new information arrived.

Higher-volume markets tend to have tighter spreads and faster price discovery — meaning the displayed YES/NO percentages are more likely to reflect the true crowd-implied probability rather than a single trader's directional view.

Key terms

YES / NO share

A binary outcome token that pays $1.00 if the underlying claim resolves true (YES) or false (NO), and $0 otherwise. The market price between 0¢ and 100¢ is the implied probability.

CLOB

Central limit order book. The matching engine that pairs YES buyers with NO buyers (effectively the same trade). Polymarket's CLOB on Polygon executes trades on-chain via the conditional-tokens framework.

Liquidity

USDC capital sitting in resting limit orders inside the order book. Deeper liquidity means smaller slippage on large trades and a tighter bid-ask spread.

UMA optimistic oracle

The on-chain dispute system that settles each Polymarket market. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution.

Slippage

The difference between the displayed mid-price and your fill price. Affects market orders most; limit orders avoid slippage but may take time to fill.

Conditional token

ERC-1155 outcome share issued by Gnosis Conditional Tokens on Polygon. The token type that resolves to $1.00 or $0.00 at settlement.

See the full prediction-market glossary →

Frequently asked questions

Risk and regulatory note

Prediction-market positions can lose 100% of staked capital. Outcomes are uncertain by definition — historical accuracy of crowd-implied probabilities is high in aggregate but not for any single market. PolyGram does not provide investment advice. Trade only with capital you can afford to lose.

Regulatory status varies by jurisdiction. Germany, the United States, and most EU countries treat Polymarket-style event contracts under one of three frameworks: financial derivative, gambling product, or unregulated novel asset. Consult local counsel before trading.

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