Trade: Which company has second best AI model end of June?

Market context

The Chatbot Arena Leaderboard, maintained by LMSYS at UC Berkeley, ranks large language models through head-to-head comparative voting. This market resolves to whichever company owns the model ranked second on the "Text Arena | Overall" leaderboard on 30 June 2026. The current order book on Polymarket prices this outcome at 67% implied probability, suggesting traders expect a specific company to hold that position with two-to-one confidence.

Historical leaderboard dynamics show considerable volatility in rankings outside the top tier. OpenAI's GPT-4 and Anthropic's Claude have dominated the summit positions since late 2023, but the second and third ranks have shifted between Gemini, Llama variants, and other contenders as model releases and voting patterns evolve. The gap between first and second place has typically been narrow enough that a single major release can reshuffle positions substantially. Comparable prediction markets on model rankings have seen probability shifts of 15–25 percentage points following announcement of new model versions.

Traders should monitor scheduled releases from major laboratories through mid-2026. Anthropic, Google DeepMind, and Meta have historically announced capability updates on irregular schedules, whilst OpenAI has maintained more predictable release cadences. Recent reporting from The Information and industry blogs suggests several companies are targeting capability improvements in early 2026. The leaderboard methodology itself—based on user voting rather than benchmark scores—means that perceived quality improvements can shift rankings faster than traditional evaluation cycles. Settlement hinges entirely on the leaderboard snapshot at the specified time, making timing of releases relative to the June deadline a material factor.

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 "Which company has second best AI model end of June?" 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?

$395K in lifetime turnover and $60K of resting liquidity puts this market in the top 10% by volume for big tech contracts on PolyGram. Order-book depth is exceptional — among the deepest order books in the category.

Last 24 hours alone saw $1K in turnover, consistent with the market's lifetime daily-average pace.

The market has been open for 7 months — long enough that the order book is mature and price is well-anchored to fundamentals.

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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