The Trump administration ordered Anthropic to revoke SK Telecom's access to Claude Mythos over alleged ties to China, and the company complied. Shortly afterward, Anthropic disabled all access to its most advanced models, Claude Mythos 5 and the consumer-facing Claude Fable 5.
June 15, 2026 · Anthropic × White House
A White House order took Anthropic's most advanced AI models offline
After a directive to revoke SK Telecom's access to Claude Mythos over alleged China ties, a Commerce export-control order halted Fable 5 and Mythos 5 for all foreign nationals — so Anthropic disabled the models for every customer.
$100M
In credits behind Project Glasswing early access — halted by the directive
1,000s
Zero-day vulnerabilities Mythos Preview found across major OS and browsers
All
Foreign nationals barred — inside & outside the US, incl. Anthropic's own staff
CyberGym vulnerability reproduction
Mythos 5 (unrestricted frontier) vs the prior Opus 4.6
Fable 5 — SWE-Bench Pro (coding)
Public version with strict safety guardrails, vs prior frontier models
Also 88% on Terminal-Bench · internal benchmarks rate it on par with a human senior engineer
DEVELOPERS PRAISE
Autonomy and reliability on long-horizon, agentic coding — completing large tasks in a single shot.
BUT FLAG
High cost, and frequent guardrail refusals — prompting an added fallback to alternative models.
How it escalated to a product halt
SK Telecom publicizes Mythos early access via Project Glasswing
→
White House orders access revoked over alleged China ties
→
Commerce bars Fable 5 & Mythos 5 for all foreign nationals
→
Anthropic disables the models for every customer
SK Telecom denies any China ties. The first case where export-control friction between government and a frontier AI company reached the product supply itself.
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