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September 12, 2026

First binding requirement for AI auditors signed into law

Also: Anthropic withholds Mythos 5.1 from UK AI Safety Institute, reports misuse incidents‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ ‌ 

X-Risk Daily

Saturday 12 September 2026

Transformative AI
First binding requirement for AI auditors signed into law
California Governor Gavin Newsom signed two bills on 9 September 2026 that establish the first framework in the United States requiring independent third-party audits and assessments of artificial intelligence systems.

Also in this issue

Transformative AI
Anthropic withholds Mythos 5.1 from UK AI Safety Institute, reports misuse incidents
Biosecurity
Anthropic says it disrupted attempt to use its AI for bioweapons research
Transformative AI
Anthropic researcher quits, warns firm is 'racing straight to self-improving superintelligence'
Transformative AI
OpenAI board member says company not on track to prevent 'catastrophic' loss of control
Research
Researchers propose formal metric to flag AI architectures that could evade chain-of-thought monitoring
Research
Researchers map how AI models could hide undesirable behaviour from RL training

… and 45 more in the full briefing

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