Which company has best AI model end of July?

Platform comparison

Active sub-markets

Market context

The real-world event hinges on which company 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% for the “YES” outcome, reflecting uncertainty about whether a leading contender will maintain its position through the settlement window.

Historical precedents show that leaderboard positions often shift rapidly due to new model releases and benchmark recalibrations. In early 2026, Anthropic’s Claude Fable 5 led composite indices, while Claude Opus 4.8 topped the Artificial Analysis Intelligence Index in May, edging out GPT-5.5 with notable gains in coding and agent tasks[1]. These swings suggest that the 11% probability may understate volatility if a major release occurs before July.

Traders should monitor upcoming model announcements from major developers, particularly those tied to coding and agent capabilities, as these domains heavily influence arena scores. Recent coverage highlights how Mt-bench benchmarks now drive ELO calculations in Chatbot Arena, making release timing and feature specificity critical catalysts[2]. Additionally, regulatory frameworks such as Germany’s GlüStV and US CFTC reach affect market accessibility, while “no-KYC up to $1,500” enables broader participation without identity verification for smaller bets.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Which company has best AI model end of July? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at PolyGram — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

PolyGram is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 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.

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.