23 resultsfor “Anthropic Mythos model security concerns”
models Fable 5 and Mythos 5, citing national security concerns. Anthropic said it received the order
Anthropic to cut off foreign access to its powerful Mythos 5 and Claude Fable 5 AI models, citing national security concerns
models for national security testing. The Center for AI Standards and Innovation (CAISI) at the Department of Commerce announced the agreement on Tuesday amid increasing concerns about the capabilities that Anthropic’s newly unveiled Mythos
security world, with concerns focussing on Mythos in particular. Its maker, Anthropic, claims the model
Mythos have since endorsed its capabilities. The US government – which had been in a [legal](https://www.theguardian.com/us-news/2026/mar/26/anthropic-ai-pentagon) [dispute](https://www.theguardian.com/technology/2026/mar/09/anthropic-defense-department-lawsuit-ai) with Anthropic – has also tested the model over security concerns
Anthropic about its concerns around Mythos. Ciaran Martin, former head of the UK's National Cyber Security Centre, told the BBC earlier this week the claim Mythos could unearth critical vulnerabilities much more quickly than
concerns about it](https://www.bbc.co.uk/news/articles/c2ev24yx4rmo), fearing the model could undermine the security of all financial systems. The AI Security Institute, which has tested both Anthropic's Mythos
Anthropic said it will “abruptly disable” its most advanced AI models for all users after the US government ordered it to suspend access to the models for foreign nationals, citing national security concerns. The company
security concerns, underscoring the US government’s policy of export controls over advanced technology. The United States’ measures come less than a week after Anthropic, the company behind the Claude chatbot, rolled
concerns about a powerful new artificial intelligence (AI) model that could undermine the security of financial systems. The development of the Claude Mythos model by Anthropic
Anthropic announced its new AI model, called Claude Mythos. The company said it found that the tool can outperform humans at some hacking and cyber-security tasks, prompting discussions by regulators, legislators and financial institutions
Anthropic last month announced its latest model, [Claude Mythos](https://www.theguardian.com/commentisfree/2026/apr/23/the-guardian-view-on-anthropics-claude-mythos-when-ai-finds-every-flaw-who-controls-the-internet), but declared that it would hold off on publicly releasing it [due to safety concerns](https://www.theguardian.com/technology/2026/apr/22/what-is-anthropic-mythos-ai-threat-global-cybersecurity) – calling the model’s ability
Anthropic says it will release other related models. - ➡️ Before Mythos Preview's limited release, the cybersecurity community grappled with the growing capabilities of commercially available advanced AI models. Developers are rushing to patch security vulnerabilities
model after US authorities raised security concerns just days following its public release. [In a statement published on its website](https://www.anthropic.com/news/fable-mythos-access), Anthropic said it was ordered to suspend foreign nationals from using Claude
concerns about this model?** Anthropic has restricted access to Mythos because of what the company calls the LLM’s ability to quickly identify vulnerabilities in critical infrastructure, including banking platforms and power grids. Anthropic says
Mythos](https://www.theguardian.com/commentisfree/2026/apr/23/the-guardian-view-on-anthropics-claude-mythos-when-ai-finds-every-flaw-who-controls-the-internet), a model with advanced cybersecurity capabilities, has raised concerns among AI safety experts, governments and tech companies, for its ability to exploit vulnerabilities at an unprecedented scale in widely used software
concerns over safety risks have proliferated. But recently, the development of more powerful AI models has spooked some federal officials, prompting the White House to reverse course and back some safety measures. [ AI model has raised concerns that organisations face a heightened risk of AI-enabled cyber-attacks. However, experts caution that most breaches still come from well-established risks
secure information systems to “streamline data synthesis, elevate situational understanding and augment warfighter decision-making in complex operational environments”. Noticeably absent from the Pentagon’s list was Anthropic, which had a major fallout with