Which company has best AI model end of July?

Platform comparison

Active sub-markets

Market context

The real-world event determining this market is the company that owns the model with the highest arena rank on the Chatbot Arena LLM Leaderboard when the table is checked at 12:00 PM ET on 31 July 2026. Current crowd-implied probability sits at 11% YES, reflecting uncertainty about which firm will secure the top spot by that date.

Historical precedents show that leaderboard dominance often shifts rapidly following major model releases, with Anthropic’s Claude Fable 5 currently leading composite indices as of June 2026, while Claude Opus 4.8 recently topped the Artificial Analysis Intelligence Index with standout coding gains[1]. Comparable cases from 2025 reveal that models tied on rank are ordered by Arena score, meaning marginal performance differences can alter final outcomes[2].

Traders should monitor upcoming model announcements from key players, particularly those scheduled for late July, as well as any updates to the Chatbot Arena methodology that could affect ranking calculations. Recent coverage highlights that coding benchmarks like SWE-bench Pro and agent performance on Online-Mind2Web are now critical differentiators for top-tier models[1]. Accessibility for this market is shaped by regulatory frameworks: German GlüStV implications may restrict certain jurisdictions, while US CFTC reach ensures oversight of prediction contracts, and the ‘no-KYC up to $1,500’ threshold allows broader participation without identity verification for smaller trades.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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 it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.