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Applied AI·September 9, 2026·1 min read

Sources: Anthropic declined to submit Mythos 5.1 to the UK AISI for pre-release testing, prompting UK fears that US AI labs are aligning with US protectionism

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If Anthropic is skipping UK AISI pre-release testing for Mythos 5.1, model governance is starting to fragment along national lines. Multinational deployers should plan for divergent approval, disclosure, and testing regimes by jurisdiction rather than assuming one global compliance path.