Thread · 5 stories · Jun 13 – Jul 14 · concluded
Three days after launching Fable 5 and Mythos 5, Anthropic disabled both globally on a US government directive — and got them back 19 days later.
Jump to timeline ↓Anthropic shipped Claude Fable 5 — the first publicly available Mythos-class model — alongside the cyberdefender-only Mythos 5, then pulled both worldwide on June 12 after a government directive citing national security, prompted by Amazon's report of a jailbreak. The same week brought the "secret sabotage" row over quietly degraded outputs for frontier AI researchers.
The ban lifted after 19 days with conditions attached: a >99%-effective safety classifier, pre-release government review and a cross-lab jailbreak rubric.
