Claude Fable 5 restored for US customers by…?

Platform comparison

Active sub-markets

Market context

Anthropic released Claude Fable 5 to the public on 9 June 2026, but suspended US customer access three days later following a government directive. This market asks whether the company will restore that access—or release an identically-capable successor under the name Claude Mythos—before 2 July 2026. A YES share pays out if either the original model or a confirmed equivalent returns to US users by the deadline; a NO share pays out if access remains blocked or no restoration occurs.

Government-mandated model suspensions remain rare in the US technology sector, making direct precedent scarce. The closest comparable cases involve temporary restrictions on large language models during regulatory reviews, most notably the brief pause on GPT-4 access in certain jurisdictions during 2023–2024. Those instances typically resolved within weeks rather than months, though none faced the specific constraint of a hard deadline coupled with a requirement for either exact model restoration or a named successor. The current 0% probability reflects the market's assessment that a three-week window is insufficient for either regulatory reversal or a credible rebranding strategy.

Traders should monitor announcements from Anthropic's leadership, statements from relevant US government agencies, and any public regulatory filings that might signal a pathway to restoration. The company's previous communication patterns suggest it typically addresses suspension decisions within 48–72 hours of implementation. Congressional testimony or regulatory guidance published before late June could materially shift expectations, as would any Anthropic announcement confirming development of Claude Mythos as a distinct product line rather than a simple rename.

Methodology

We track Claude Fable 5 restored for US customers by…? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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?

On Prediction Market UK, 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.

Is this market available outside the US?

Prediction Market UK 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.

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 Prediction Market UK?

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