Hello. The federal government’s long-awaited oversight measures for Anthropic’s Mythos, OpenAI’s GPT-5.5 and other frontier AI models are being met with a shrug by corporate cybersecurity chiefs.

Cyber professionals say the vague, voluntary nature of President Trump's executive order, issued Tuesday, does little to allay fears that, without binding regulations, AI developers have wide latitude over powerful tech that could threaten corporate and national security. Read our full story.

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Anthropic is calling for top AI labs to weigh slowing the pace of development, suggesting that AI systems are advancing so rapidly that they may soon be able to improve themselves without human intervention in ways that could pose significant societal risks.

• Others have suggested that Anthropic’s warnings about the dangerous potential of its own tools could also be considered a marketing ploy. Skeptics point to Anthropic’s decision to limit its release of a powerful “Mythos” cybersecurity model capable of finding bugs and problems as a handy way to tout its capabilities. (WSJ)

CISO move: Ahmed Pasha joined Tradeweb, a financial tech firm that runs trading platforms, as global CISO. Pasha previously was US head of information security for Tokyo-based financial services firm Nomura. 

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The WSJ Pro Cybersecurity team is Deputy Bureau Chief Kim S. Nash and reporters Angus Loten and James Rundle. Follow us on X @WSJCyber. Reach the team by replying to any newsletter you receive or by emailing Kim at kim.nash@wsj.com.