Breaking

US Rejects UK Carveout, Halts Foreign Access to Anthropic's New AI Models

June 16, 2026 at 15:44 EDT

Policy & Regulation
Foundation Models
Security

The Trump administration issued an export control directive restricting foreign access to Anthropic's frontier AI models "Claude Fable 5" and "Claude Mythos 5," and rejected a request by UK Prime Minister Keir Starmer for a carveout for the United Kingdom. Anthropic complied with the directive and immediately suspended access to both models for all users worldwide.

June 13 · US Export Control Directive

Trump Administration Blocks Anthropic's Top AI Models From Foreign Nationals — UK Ally Denied a Carve-Out

Citing "national security authorities," the US Commerce Department cut off access to Claude Fable 5 and Mythos 5 for any foreign national worldwide. Anthropic suspended both models, and Keir Starmer's request for a UK exception was rejected as "completely illogical."

models suspended — Fable 5 & Mythos 5 (other Claude models unaffected)

ALL

foreign nationals inside & outside the US covered, incl. Anthropic staff

exceptions granted — UK carve-out request refused

Coding Benchmark Lead — SWE-Bench Pro

Higher is better. Each block ≈ 10 percentage points.

80.3%

Fable 5 / Mythos 5

69.2%

Opus 4.8

58.6%

GPT-5.5

Why the block — and the dispute

The directive followed a possible "jailbreak" found on Fable 5. Anthropic and the government disagree on how serious it is.

US Government

One of its broadest AI export-control measures yet — an exception even for a G7 ally would be "completely illogical."

Anthropic

A "narrow, limited and non-universal jailbreak" achievable on other public models — the response is a "misunderstanding."

Developer Praise

Rated "best-in-class coding models" — strong at agentic, long-running tasks and large projects.

The Critiques

"Overly conservative" refusals, costly and slower, with fast API credit burn. Anthropic admits a "wrong tradeoff."

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