Claude Mythos: Coding Arena Debut?

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Active sub-markets

Market context

Polymarket traders are pricing a Claude Mythos model's arrival on Arena.ai's Coding Leaderboard at 99% probability through end-2026, with settlement hinging on whether the debut model meets a specified performance threshold within 24 hours of its first appearance. The contract trades on Polygon as conditional USDC tokens, meaning buyers holding YES shares receive full payout only if Anthropic releases a model bearing the Mythos designation and it scores at or above the threshold on the leaderboard's evaluation suite. This near-certainty pricing reflects confidence in both Anthropic's product roadmap and the technical feasibility of meeting the coding benchmark, though the exact threshold remains a settlement variable that could introduce dispute risk.

Anthropic has signalled expansion of its model family beyond Claude 3.5 Sonnet, with Mythos representing a rumoured next-generation architecture. The company's historical pattern shows quarterly or semi-annual major releases; the last substantive model update occurred in October 2024. Arena.ai's leaderboard itself has grown as a benchmark destination for coding tasks, attracting submissions from OpenAI, Google DeepMind, and other labs, making it a natural venue for Anthropic to showcase new capabilities. No official announcement of a Mythos launch date has been published as of late 2024.

Traders should monitor Anthropic's official communications channels and developer documentation for any Mythos model announcement, which would likely precede leaderboard submission by days or weeks. The settlement window's December 2026 expiry provides substantial runway, but the 99% price suggests the market views a Mythos release within that frame as near-inevitable. The threshold specification itself—disclosed only at settlement—remains the primary execution risk, as a model could debut but underperform the undisclosed benchmark, triggering NO resolution despite the release occurring.

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?

Polymarket Scam? 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 Polymarket Scam??

Zero. Polymarket Scam? routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

Do I need to KYC for this market?

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