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#mythos
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Anthropic reports a frontier cybersecurity model finding 70% of Palo Alto flawsArora said the test was conducted in April and that Mythos 5 was able to probe systems continuously and cheaply. The figure is a vendor executive's account, and the public report does not provide a detailed breakdown of the vulnerabilities or independent validation.→Anthropic releases Claude Fable 5.1 and restricted Mythos 5.1Anthropic released Fable 5.1 and Mythos 5.1 as the same underlying model with different safeguards: Fable is generally available, while Mythos remains restricted to trusted cybersecurity and life-sciences programmes. Anthropic says cache-read pricing makes typical Fable workloads about 25% cheaper and highly agentic workloads up to 45% cheaper, while new safeguards cut cybersecurity false-positive blocks by 60%; customer-controlled Enterprise Frontier Safeguards are planned for later this year.→