Anthropic's Fable 5 and Mythos 5 Are Back with New Security Guardrails
ID: d206f290-03af-59f4-8f46-edec168c989f
STIX ID: report--d206f290-03af-59f4-8f46-edec168c989f
Feed Name: Infosecurity Magazine (News)
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Anthropic resumed global availability of its Claude Mythos 5 and Claude Fable 5 models after US export controls were lifted, but deployed an updated Fable 5 with a new safety classifier to block a reported jailbreak that could reveal software vulnerabilities and produced an exploit in one instance; the company is coordinating with government and industry partners, validated mitigations with US agencies, and opened a HackerOne program for researchers to report jailbreaks.
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