Claude Fable 5, the frontier AI model Anthropic released to the public on June 9, 2026, was disabled worldwide around June 12 — roughly 72 hours after launch — following a US export control directive. Prediction markets now put the chance of it being restored for US customers within a week at 55%.
June 18, 2026 · Anthropic
Claude Fable 5 Goes Dark — Now a Coin-Flip to Return Within a Week
After a U.S. export-control directive suspended Anthropic's flagship model worldwide, prediction markets put roughly a 55% chance of U.S. restoration within seven days — even as jailbreak questions stay unresolved.
~55%
Implied odds of restoration within a week
$856K
Prediction-market volume on the timing
50M
Lines of Stripe's codebase migrated in one day
Market odds, by restoration deadline
Polymarket pricing as of June 18 — each block ≈ 10% probability
From launch to lights-out — in four days
JUN 9 · LAUNCH
Fable 5 ships as a Mythos-class model with safety classifiers
→
JUN 10 · JAILBREAK
Guardrail bypass confirmed; harmful queries reported getting through
→
JUN 12 · SUSPENDED
Export-control directive pulls Fable 5 & Mythos 5 worldwide
WHAT IMPRESSED
SOTA across software engineering, vision, knowledge work and research
A "previously unattainable" class for days-long autonomous tasks
Reconstructs working code from screenshots; priced under half of Mythos Preview
WHAT WORRIES
Confirmed jailbreak — "real danger, or marketing?"
Guardrails so conservative they block harmless queries
Fallback to Opus 4.8 means slower runs and heavier token use
One suspension, two competing explanations — and the restoration timeline stays fluid.
THE JAILBREAK THEORY
Anthropic says the move "may be related to jailbreak concerns."
THE EXPORT-RULE THEORY
Reporting argues it was about barring foreign-national and overseas access — not a technical flaw.
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