Anthropic's initial announcement of Mythos drew major attention around the world.
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Anthropic is finally willing to give you some Mythos, but it comes with some safeguard strings attached.On Tuesday, Anthropic said it was releasing a "Mythos-class" model called Claude Fable 5, but with safeguards so significant that it gave the model a different name."Without safeguards, Fable 5's capabilities in areas like cybersecurity could be misused to cause serious damage," Anthropic said in a statement accompanying the release. "We've therefore launched the model with safeguards that mean queries on some topics will instead receive a response from our next-most-capable model, Claude Opus 4.8."Anthropic is also continuing Project Glasswing, which it first announced in April, that gave early access to the first version of Mythos, Claude Mythos Preview, to an initially limited number of tech, cybersecurity, and financial companies. The AI company said "a small group of cyberdefenders and infrastructure providers" will get access to Claude Mythos 5, which is the same model as Fable 5, "but with the safeguards lifted in some areas.""It has the strongest cybersecurity capabilities of any model in the world," the company said of Mythos 5. "Soon, we intend to expand access to Mythos 5 through a broader trusted access program."When Anthropic released Claude Opus 4.8 on May 28, the AI startup said it expected to "be able to bring Mythos-class models to all our customers in the coming weeks." Anthropic said Fable 5 is part of "a tier of Claude models that sit above our Opus class in capability."The release comes at a critical time for Anthropic, which recently announced that it had confidentially filed a draft S-1, officially kicking off the march toward a blockbuster IPO.
