12 articles mentioning MYTHOS-26B-A4B-PRISM-PRO-DQ-MLX
Anthropic's tightly controlled rollout of Claude Mythos has taken an awkward turn. After spending weeks insisting the AI model is so capable at cybersecurity that it is too dangerous to release publicly, it appears the model fell into the wrong hands anyway. According to Bloomberg, a "small group of
arXiv:2604.20496v1 Announce Type: cross Abstract: The April 2026 Claude Mythos sandbox escape exposed a critical weakness in frontier AI containment: the infrastructure surrounding advanced models remains susceptible to formally characterizable arithmetic vulnerabilities. Anthropic has not publicly
Several US federal agencies are taking up Anthropic's new cybersecurity model to find vulnerabilities, but one is reportedly not getting in on the action: the nation's central cybersecurity coordinator. On Tuesday, Axios reported that the Cybersecurity and Infrastructure Security Agency (CISA) didn'
Anthropic told TechCrunch it is investigating the claims, but maintains that there is no evidence that its systems have been impacted.
This week, during a podcast appearance, OpenAI CEO Sam Altman called out his competitor's new cybersecurity model, noting that the company was using fear to make its product sound more impressive than it actually is.
NSA is said to be using Anthropic's restricted Mythos AI model.
arXiv:2604.13466v2 Announce Type: replace-cross Abstract: The Claude Mythos Preview system card deploys emotion vectors, sparse autoencoder (SAE) features, and activation verbalisers to study model internals during misaligned behaviour. The two primary toolkits are not jointly reported on the most a
Anthropic has released its most powerful "generally available" model to date: Claude Opus 4.7. The company called it a step up from Opus 4.6 for advanced software engineering tasks, particularly in complex coding areas that in the past required more hand-holding. It's also supposed to be better at a
In an interview at the Semafor World Economy summit this week, Anthropic co-founder Jack Clark explained why the company was still engaged with the U.S. government while simultaneously suing them.
The report is particularly surprising since the Department of Defense recently declared Anthropic a supply-chain risk.
Anthropic said this week that it limited the release of its newest model, dubbed Mythos, because it is too capable of finding security exploits in software relied upon by users around the world. Are real cybersecurity concerns a cover for a bigger problem at the frontier lab?
The new model will be used by a small number of high-profile companies to engage in defensive cybersecurity work.