
Photo: Natalie Behring/Getty ImagesNatalie Behring/Getty Images
Anthropic’s Fable and Mythos—the wide-release and limited-access versions of the same Claude model—have received point upgrades two and a half months after their original launch.
(“Controversial,” you’ll recall, because Mythos scared the dickens out of the American military-industrial complex with its supernatural software flaw-finding capabilities that, in the wrong hands, could lead to a tidal wave of crippling digital attacks.)
Like any good tech upgrade, Anthropic
says the new versions are more capable and less costly than their predecessors. Fable 5.1, for example, “avoids shortcuts that result in poorer-quality work” and fixes “the root causes of software issues” yet costs up to 45% less for agentic work, its maker estimates.
The IPO-bound San Francisco company is so confident in its advancements that it believes they “add to the evidence that AI models will soon make important contributions to scientific discovery,” particularly for molecular design, computational analysis, and computational biology.
Still, it’s the risks of being so capable that keep people up at night.
Anthropic says Mythos has safeguards in place to prevent it from creating chemical or biological weapons, stop it from hacking into systems it shouldn’t, and discourage it from accepting malicious agentic coding requests. It also has “anti-distillation mechanisms” in place to foil competitors’ attempts at copying its capabilities.
“AI models’ agentic capabilities have become much more powerful over the past two years,” the company wrote. “But … greater autonomy comes with new risks.”
—AN