Rolling record / ARQ 78 Severe · ▲ +24 7-day 314 events in window / as of 14 Sept 2026
ARQAI Risk Quotient
capability 88 Danger

Anthropic launches Claude Fable 5.1 and Mythos 5.1

Fable is generally available; Mythos stays behind a vetting gate for cyber and life sciences.

Anthropic · 2026-09-01

Fable is generally available; Mythos stays behind a vetting gate for cyber and life sciences.

Risk 3 · Mitigation 0.