Claude Mythos Preview: The Most Important AI Release Wasn't a Release

Anthropic’s most important signal this month is not a benchmark chart. It is the fact that the company published a full system card for Claude Mythos Preview and then explicitly said it does not plan to make the model generally available. That is a very different kind of launch. If Anthropic’s own materials are directionally right, then we are moving from “AI can help security teams” to something…