Claude Mythos released by…?

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Market context

A data breach on 26 March 2026 exposed Anthropic's unreleased Claude Mythos model ahead of any official announcement. The company subsequently confirmed the model exists and is undergoing early access testing, with claims of substantial improvements across coding, reasoning, and cybersecurity capabilities. The leak forced Anthropic's hand on disclosure but left the formal release timeline entirely unspecified.

Anthropic's track record with Claude releases shows variable gaps between internal testing phases and public availability. Claude 3 family models moved from announcement to general access within weeks, whilst earlier versions experienced longer staged rollouts. The company has historically used "early access" periods lasting anywhere from two weeks to several months before wider deployment, making precedent an unreliable guide. Competitor release patterns—OpenAI's GPT-4 took roughly four months from announcement to general availability—suggest no industry standard exists for moving from confirmed testing to public release.

The settlement window closes 30 April 2026, leaving roughly one month for Anthropic to formally release Claude Mythos or confirm it as the leaked model's official designation. Traders should monitor Anthropic's official channels and earnings calls for release date commitments, though the company has shown reluctance to announce timelines under pressure. Any statement from Anthropic explicitly naming Claude Mythos as a released product—whether through blog post, API documentation, or product page—would trigger resolution. The current 0% probability reflects genuine uncertainty rather than consensus that release is impossible within the window.

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

Is this market available outside the US?

Champions League Prediction 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 Champions League Prediction?

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