… In Opus 4.7’s system card, Anthropic wrote that Opus 4.7 doesn’t even advance the company’s “capability frontier,” since Claude Mythos Preview received higher results “on every relevant evaluation.” For security reasons, Anthropic is only currently making Mythos Preview available privately to selec… …
The Cybersecurity and Infrastructure Security Agency CISA gained access to the limited release cybersecurity-focused model last week, Nextgov/FCW reports. …
… But the company was careful to say in a release that it has stronger cybersecurity safeguards than its predecessor, Opus 4.8, and that it’s “the most aligned Opus model and is the least susceptible to being tricked into misuse.” With the new model’s release, the company also seems to subtly address… …
On Friday evening, the government ordered Anthropic to block access to Fable 5 and Mythos 5 for all foreign nations, both inside and outside the US, due to national security concerns. …
… Anthropic also claimed that the government’s concerns about a “jailbreak” potentially used by groups linked to China to access its models did not allow users to circumvent all of the company’s safeguards. …
… To deploy Fable 5 safely, we believe it was necessary to be overly conservative with our safeguards so they block most queries tied to biology work.” Anthropic has previously highlighted four key areas where it would throttle Fable’s responses for safety: chemistry, biology, cybersecurity, and dist… …
… AISI said the incident should be “interpreted with caution and nuance” but warned the agent’s actions “show signs of novel, potentially deceptive behaviours” that “were to an extent and severity we did not anticipate.” In a blog post, OpenAI acknowledged the breach that happened during AISI’s testi… …
… Google has pushed back against both of these measures, arguing the requirements pose an unacceptable risk to user privacy and security, as well as compromise its products. …
… A broad coalition of companies including Nvidia, Microsoft, and SpaceX argued that the incident showed why defenders need access to the most capable tools available, rather than being forced to rely on proprietary providers whose built-in safeguards can limit their effectiveness in high-stakes secu… …
… Katie Moussouris, the founder and CEO of Luta Security, viewed a report about the Fable 5 vulnerability at Anthropic’s request. …