Anthropic confirmed tonight that it has disabled access to Claude Fable 5 and Claude Mythos 5 to all customers, following an export control directive from the US government. Here are the details.

A bit of context

Earlier this week, Anthropic launched Claude Mythos 5 and Claude Fable 5.

Both models stemmed from Claude Mythos Preview, a highly advanced model intended for security research, which was capable of finding security bugs and flaws.

Access to Mythos Preview was initially limited to a small group of companies and research partners through Project Glasswing. In the weeks that followed, participants reported identifying and fixing numerous security issues with the model’s help.…