Claude Mythos 5 access restored by…?

Platform comparison

Market context

The underlying event is a US government export-control directive that forced Anthropic to suspend access to Claude Mythos 5 and Fable 5 on 12 June 2026, followed by a partial restoration on 26 June 2026 for over 100 US organisations in cyber defence and critical infrastructure [2][5]. The current crowd-implied probability of a full restoration to at least one previously rescinded US partner is 0% YES, reflecting a consensus that the broader rollout remains blocked and no public timeline exists for Fable 5 [2][3]. In handicapper terms, the favourite is the "No" outcome; the underdog is a full "Yes" resolution. Value may sit contrarian if traders spot a shift in US export policy or an unexpected announcement from Anthropic, as partial lifts have occurred before but full reversals are rare under active export controls [1][2].

Historically, similar US export-control suspensions of frontier AI models have resulted in partial, not full, restorations, with broader access remaining gated for months or years [2][9]. The 26 June lift for Mythos 5 to a select group of US entities mirrors past patterns where security-critical users regain access first, while general availability lags [2]. This frames the 0% probability as rational: the market is pricing in the likelihood that Fable 5 stays restricted and that no previously rescinded US partner outside the cyber-defence cohort will be reinstated by the settlement date [2][3]. A trader should watch for announcements from the White House on export-control adjustments, scheduled updates from Anthropic on model availability, and any procurement-team guidance on near-term restoration scenarios [1][2]. Recent reporting by PCMag and 9to5Mac confirms Anthropic was cleared to restore Mythos 5 for a select group, but Fable 5 remains gated with no confirmed timeline [2].

The key dependencies are US government policy shifts, Anthropic’s internal rollout schedule, and whether any previously rescinded US partner outside the cyber-defence cohort is added to the approved list before 11:59 PM ET on 30 June 2026 [1][2]. If the White House lifts remaining export controls, the "Yes" outcome could become viable, but absent such a move, the consensus "No" remains the most probable path [1][2]. Contrarian angles would require evidence of a policy reversal or an unexpected expansion of the approved user list, which has not materialised as of 30 June 2026 [2]. The settlement window ends 2026-06-30T19:59:00Z, and the market resolves to "Yes" only if access is restored to at least one US partner or client whose access was previously rescinded [query].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Claude Mythos 5 access restored by…? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win, which mirrors the Polymarket order book at 0% fees.

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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Who Will Win. 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.

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?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Who Will Win trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.