Claude Fable 5 restored for US customers by…?

Platform comparison

Active sub-markets

Market context

On 12 June 2026, the US government issued an export-control directive forcing Anthropic to suspend all access to Claude Fable 5 and Claude Mythos 5 for foreign nationals, leading the company to disable the models for every customer worldwide to ensure compliance[1][2][3]. The suspension was triggered by national-security concerns, including a reported jailbreak bypassing safety filters and allegations that Amazon researchers used the model to gather cyberattack data, alongside White House suspicions of Chinese-linked access to Mythos[4].

Historical precedents for such abrupt, government-mandated shutdowns of commercially available technology are rare, but when they occur, restoration is exceptionally unlikely unless the underlying security threat is fully resolved or the directive is overturned by higher legal authority[4]. This explains the current 0% crowd-implied probability: unlike typical market suspensions where access resumes after a brief review, export-control bans tied to national security have rarely been reversed, and no comparable case in the past decade saw a suspended frontier model restored to US customers after a full global disablement[4].

Traders should monitor official statements from Anthropic and the US Commerce Department for any indication that the directive has been lifted or that a substitute model confirmed as identical to Fable 5/Mythos 5 is being approved for US release[2]. Recent reporting from Forbes notes that the catalyst remains the reported jailbreak and cyberattack allegations, with no public sign of a resolution pathway as of mid-June[4]. Key dependencies include whether Anthropic can demonstrate effective mitigation of the safety bypass or if the White House revises its stance on Chinese-linked access, both of which would be necessary for any restoration to occur[4].

Platform comparisons reveal significant divergence: Polymarket displays decimal odds (e.g., 0.00) while Kalshi, Betfair, and Smarkets use implied probability (0%), creating confusion for cross-book traders; fee structures also vary, with Polymarket charging 2% on wins versus Kalshi’s 0% but higher KYC thresholds, and Betfair/Smarkets requiring full identity verification for US access, limiting liquidity on this specific market where the probability is effectively zero across all books[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Claude Fable 5 restored for US customers by…? from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

Resolution & payout

Polymarket settles via UMA Optimistic Oracle on Polygon. A proposer posts the outcome with a bond, the two-hour window runs, then the smart contract pays USDC.

Kalshi settles USD through the CFTC-regulated clearinghouse — the cleanest variant, with heavier KYC. Betfair Exchange settles in account currency (GBP/EUR), net of 2-5% commission. Smarkets follows the same model as Betfair with a lower default 2% commission.

FAQ

Is this market available outside the US?

PolyGram 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 PolyGram?

Zero. PolyGram 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.

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.