Anthropic’s Mythos 5 is back
AI disclosure
Summary
After a rollercoaster negotiation process with the Trump administration that dragged on for two weeks, Anthropic's Mythos 5 is finally back in action - at least, somewhat, for a select group of organizations, according to a letter from the government to Anthropic that was viewed by The Verge. Fable 5, however - the public-facing Mythos-class […]
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Andrej Karpathy joined Anthropic five weeks ago.
— Raytar (@Raytar) June 26, 2026
Yesterday my friend on his team sent me the Claude.md file he actually uses.
It completely changed how I work with Claude.
From the very first message, the difference was obvious.
With this file, Claude finally stops fighting me… https://t.co/ruhm6s2tLb pic.twitter.com/YEoSMaSMqJ