From yesterday, if you missed it:

Anthropic: System Card: Claude Mythos Preview https://www-cdn.anthropic.com/53566bf5440a10affd749724787c8913a2ae0841.pdf

Related:

The Hacker News: Anthropic's Claude Mythos Finds Thousands of Zero-Day Flaws Across Major Systems https://thehackernews.com/2026/04/anthropics-claude-mythos-finds.html @thehackernews #infosec #zeroday #Claude