Which company has best AI model end of June?

Platform comparison

Active sub-markets

Market context

The real-world event hinges on which company owns the LLM topping the Chatbot Arena leaderboard when checked at 12:00 PM ET on 30 June 2026, with Anthropic’s Claude Fable 5 currently leading at a perfect 100/100 composite score across 357 models[1]. This 0% crowd-implied probability for the “Yes” outcome likely reflects a market misreading of historical volatility in leaderboard rankings, where top positions have shifted dramatically within weeks due to rapid model iterations and community re-evaluations, as seen in comparable 2024–2025 cycles where leaders like GPT-4 and Llama-3 were overtaken by newer entrants[9]. Traders should monitor upcoming model release schedules from major firms, particularly any announcements tied to the June check date, and watch for shifts in Arena Elo scores driven by new coding or creative-writing benchmarks[4]. A recent update to the LMSYS Chatbot Arena snapshots confirms daily auto-updated data tracking, meaning sudden score changes could resolve the market unexpectedly[3]. Regulatory accessibility is shaped by German GlüStV provisions limiting unlicensed gambling, US CFTC reach over binary options, and the “no-KYC up to $1,500” threshold, which allows retail participants to access this market without identity verification if their stake remains under that limit, enhancing liquidity for smaller traders while maintaining compliance boundaries.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), 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

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.

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.

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.