Which company has top AI model end of June? (Style Control On)

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Market context

Anthropic’s Claude Fable 5 has just secured the top spot on the June 2026 composite quality index, leading 357 models with a perfect 100/100 score across quality, price, speed and value[1]. This rapid ascent from Anthropic, which previously held the top four spots in Code Arena with Opus 4.6 dominating all three leaderboards simultaneously in February 2026, marks a significant shift in the competitive landscape[2]. The current 2% crowd-implied probability for any other company to win by June 2026 reflects a historical pattern where the model holding the #1 position across Text, Code and Search arenas tends to maintain dominance for extended periods, as seen when Opus 4.6 held the lead for months without OpenAI, Google or xAI pulling ahead[2].

Traders should monitor Anthropic’s upcoming product announcements and the scheduled release dates for OpenAI’s GPT-5.3 and Google’s Gemini 4.0, which could disrupt the current hierarchy if they achieve superior arena scores[2]. The dependency on style control settings in the Text Arena leaderboard remains critical, as minor adjustments in evaluation criteria have previously caused substantial rank fluctuations between competing models[2]. Recent coverage from Arena AI highlights how Claude Opus 4.6 reclaimed #1 in Search Arena with a 30-point margin over Grok-4.20-beta1, suggesting that sustained investment in multi-arena performance is the key catalyst for maintaining top rankings[2]. The settlement window ending 30 June 2026 provides ample time for new model releases to alter the leaderboard, but historical data indicates that the current leader typically retains its position unless a competitor achieves a breakthrough score exceeding 1500 points[2].

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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, 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.

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 Prediction Today?

Zero. Prediction Today 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, Prediction Today triggers a quick verification flow that finishes in minutes.