The Mythos NSA Story Is Amazing Even If You Shouldn't Read It Literally

Sun, 21 Jun 2026 23:58:00 -0300

The headline version is too clean: Mythos broke into the NSA. That is almost certainly not what happened. The more interesting version is messier, caveated, and still astonishing.

Here is the chain the viral claim traveled down. Senator Mark Warner, vice chair of the Senate intelligence committee, said the NSA’s chief — Joshua Rudd — had told him that Anthropic’s Mythos model “broke into almost all of our classified systems, not in weeks, but in hours.” The Economist printed the quote. Then the journalist who reported it, Shashank Joshi, walked the edges back in public. He stood by the wording — he had accurately quoted Warner quoting the NSA chief — but said it would be a mistake to read it literally. It surely depended on using Mythos alongside other tools under very particular conditions. He had used the line to convey the model’s potency, and conceded it was a mistake not to have added caveats.

Fable 5 Went Dark, and the Runbook Was Missing

Sat, 13 Jun 2026 11:07:32 -0300

My editor knew before the news did. I was mid-task on Friday afternoon, Claude Code humming along on Fable 5, when the session dropped a banner saying the model was unavailable and that it was falling back to Opus 4.8. My first reaction was not about AI policy. It was the reflex every on-call engineer has when a dependency stops answering: what broke, what is my fallback, and how much of my work assumes the thing now gone.

Mythos on Danilo Falcão da Silva

The Mythos NSA Story Is Amazing Even If You Shouldn't Read It Literally

Fable 5 Went Dark, and the Runbook Was Missing