U.S. Orders Anthropic to Suspend Fable 5 and Mythos 5 Access for Foreign Nationals
07:42 · June 13, 2026 · Hacker News AI Section
Anthropic said on Friday it will "abruptly disable" its most advanced artificial intelligence (AI) models, Claude Fable 5 and Mythos 5, for all users after the U.S. government ordered it to suspend access to the models for foreign nationals, whether inside or outside the U.S., citing national security concerns. The AI company said it received an order at 5:21 p.m. ET, instructing it to suspend
Summary
The U.S. government directed Anthropic to suspend access to its frontier models Claude Fable 5 and Mythos 5 for all foreign nationals, whether located inside or outside the United States, on national-security grounds. Anthropic received the order at 5:21 p.m. ET and responded by disabling the models for every user, while stating that it viewed the directive as based on a misunderstanding and that it is working to restore service. Access to all other Anthropic models remains unaffected.
The directive stems from government concerns over a narrow, non-universal jailbreak that could allow Fable 5 to surface previously known software vulnerabilities. Anthropic reviewed the reported technique and concluded that the same class of issues can be identified by other publicly available models, including OpenAI’s GPT-5.5, without any bypass. Mythos 5, which shares the same base weights but operates with reduced safeguards in cybersecurity domains, had been positioned as offering the strongest offensive cyber capabilities of any released model; it continues to be available only to a vetted set of defenders and critical-infrastructure operators.
Anthropic maintains that its safety classifiers already block single-turn requests involving exploit development or attack planning, and that third-party and internal red-team exercises found the guardrails substantially stronger than those of prior models. The company argues that perfect jailbreak resistance is unattainable for any provider and that a narrow technique should not trigger the withdrawal of a widely deployed commercial system. It has also noted ongoing friction with the Department of Defense, which earlier designated Anthropic a supply-chain risk after the firm attempted to restrict military use of its technology.
The abrupt global cutoff illustrates how U.S. export-control decisions can instantly alter availability for international users and organizations that rely on American frontier models, regardless of where those users are physically located.
Why it matters
This article is highly relevant for Dutch security and privacy professionals as it demonstrates a critical third-party availability risk and geopolitical dependency. Dutch enterprises relying on these models will face immediate operational disruptions, underscoring the need for AI sovereignty and robust business continuity planning.
