Arguably

Arguably

Britain’s AI sovereignty is an illusion

Without more domestic capacity we risk being locked out of the future

Martha Dacombe's avatar
Martha Dacombe
Jun 18, 2026
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(PhotoGranary02/Shutterstock)

Last weekend, following intense discussion and negotiation, the US government forced Anthropic, the world’s most valuable AI firm, to close down two of its most capable models for foreign nationals. Fable 5 and Mythos 5 operate at the frontier of machine cyber-capability and were switched off because Washington decided that …

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