On Tuesday, Anthropic launched a new “Mythos-class” model, Fable 5, describing it as being more powerful than any other model the company had ever made generally available. It’s a significantly tamer version of Mythos, the behemoth model which Anthropic announced in April but has thus far withheld from the public due to its alleged sophistication at finding and exploiting cybersecurity vulnerabilities. If users ask Fable 5 about potentially sensitive subje