Anthropic declined to submit Mythos 5.1 to the UK AISI for pre-release
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
TL;DRAnthropic skipped UK safety testing for its new model, raising protectionism concerns.
Why it matters: Signals potential fracturing of international AI safety standards and regulatory coordination.

Anthropic's Alignment Science lead says there is a ">10%" chance AI
TL;DRAnthropic's alignment lead estimates >10% chance AI poses existential risk this decade.
LWiAI Podcast #256 - Fable 5.1, Astra Tease, Gemini 3.8 Flash
TL;DRAnthropic released Claude Fable 5.1; OpenAI showed off AI with hacking skills; security incident was worse than reported.
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