Which company has best AI model end of June?

Platform comparison

Active sub-markets

Market context

The outcome will be set by which company’s model sits highest on the Chatbot Arena leaderboard when the June 30 check is made, not by benchmark scores or product launches alone. With the market at 24% YES, the field is still open: recent months have shown that leadership can change quickly after a new release, and the Arena’s ordering can move on relatively small score gaps. For context, Anthropic’s Claude Opus 4.6 and then later 4.7 runs have repeatedly pushed it to the top of monthly “best model” markets, while Google has also led at times on the same Arena-based reference point. On Polymarket, the contract is usually quoted as an implied probability, whereas Kalshi and some other books may show decimal-style pricing or contract prices; that makes cross-platform comparisons imperfect, especially once fees and access rules are included. Kalshi resolves at model level in some variants, while Polymarket’s version here resolves to the owning company, which can matter if a new preview model is launched under a different brand.

The main catalysts are launch timing, leaderboard refreshes and any late-model releases from Google, Anthropic, OpenAI or xAI before the June 30 noon ET check. Traders should watch official announcements around Gemini, Claude and GPT families, because a single frontier release can change Arena rank within days. The relevant source is the Chatbot Arena leaderboard itself, whose rank table and tie-break by Arena score will decide the result. Liquidity, KYC availability and fee treatment also differ by venue: Polymarket uses on-chain settlement with a broad retail reach in supported regions, while Kalshi is US-regulated but more limited geographically; Betfair and Smarkets, where available, can price similar events through exchange-style odds but may not list this exact contract.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Which company has best AI model end of June? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

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.

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.

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?

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