Which company has best AI model end of July?

Platform comparison

Market context

The market resolves to whichever company owns the model with the highest Chatbot Arena rank when the leaderboard is checked on 31 July 2026 at 12:00 PM ET. Today, Polymarket prices this contract at 13% for the “YES” outcome, reflecting a crowd view that the current leader is unlikely to retain top spot by settlement. On-chain, the position trades in USDC on Polygon, using conditional tokens that lock payouts once the oracle confirms the final leaderboard state.

Historically, Chatbot Arena’s top rank has shifted frequently as new models enter and user battles recalibrate scores. In mid-2025, Anthropic’s Claude 3.5 held the lead for months before Google’s Gemini 2.0 overtook it following a major update. By June 2026, Anthropic’s Claude Fable 5 leads the composite index at 100/100 across 357+ models, but past volatility suggests even a 100-point score can be challenged by a single strong release in the final weeks[1].

Traders should watch for Q3 model announcements from major labs, especially those tied to the July leaderboard refresh. A recent report notes that LMSys Arena updates its rankings weekly, with style-control disabled for the official check, making raw Arena scores decisive[3]. Any surprise launch from OpenLM, Google, or Meta in late July could displace the current leader, particularly if the new model scores above 100 in early battles. The settlement window closes 31 July 2026, so timing of releases is critical.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.