AI-powered vulnerability discovery, as demonstrated by Mythos Preview, is shifting from sparse to dense sampling of software attack surfaces, potentially leaving attackers with fewer zero-day exploits…
The European Union Agency for Cybersecurity (ENISA) is meeting with Anthropic in San Francisco on June 18 to negotiate access to Mythos, an AI model designed for vulnerability research, amid new US ex…
The Trump administration ordered Anthropic to revoke access to its Claude Mythos and Fable 5 AI models after concerns over SK Telecom's alleged ties to China and Amazon-identified vulnerabilities. Ant…
The Cybersecurity and Infrastructure Security Agency has received full access to Anthropic's Mythos Preview model, a powerful AI tool for vulnerability scanning, but the White House has not yet set cl…
Anthropic CEO Dario Amodei warned that Chinese AI models are 6 to 12 months away from matching US capabilities, specifically citing 'Mythos-class' AI that can find thousands of software vulnerabilitie…
Anthropic researcher Nicholas Carlini, who initially warned colleagues in March that the company's next-generation AI model Mythos was too capable to release, has become central to Anthropic's argumen…
Anthropic took its Claude Fable 5 and Mythos 5 AI models offline after a US government export-control directive barred foreign nationals from using them, citing national security risks. Experts warn t…
The United States Government forced Anthropic to remove access to its Fable and Mythos models on Friday evening, citing unspecified concerns. The move has drawn criticism from observers who argue it s…
Anthropic released Fable 5, a restricted version of its powerful Mythos AI model, on June 9 after months of tension with the White House over access and safety. The company had previously limited Myth…
Anthropic released Claude Fable 5, a Mythos-class model previously considered too capable to ship, on June 9, 2026. However, evaluations comparing Fable 5 to Opus 4.8 across nearly 1,000 agent tasks s…
Anthropic disabled its Fable 5 and Mythos 5 AI models globally after the US government issued an export control directive citing a potential narrow jailbreak, according to a June 12 statement. The dir…
Visa released an open-source vulnerability discovery harness called VVAH that uses frontier AI models from Anthropic and OpenAI to automate security testing. The tool employs multi-agent deterministic…
Anthropic benefits from the US government's export ban on Fable/Mythos, validating its claim that the AI model was too dangerous to release. The ban provides a free pass to miss revenue targets, creat…
Anthropic disabled two of its most advanced AI models, Claude Mythos Preview and related models, after a U.S. government export control directive cited national security concerns. The company had prev…
The U.S. Commerce Department ordered Anthropic to suspend foreign access to its Fable 5 and Mythos 5 AI models over national security concerns tied to a jailbreak technique. Anthropic disabled the mod…
The U.S. government issued an export control directive requiring Anthropic to suspend access to its most advanced AI models, Fable 5 and Mythos 5, for foreign nationals, citing a potential jailbreak t…
Anthropic released Claude Fable 5, its first public Mythos-class model, achieving state-of-the-art results on long, multi-step reasoning and autonomous task completion. The model tops benchmarks like …
Anthropic's Mythos 5 model was pulled from global access after a jailbreak bypassed its trained safety guardrails, demonstrating that AI safety must be enforced outside the model through environmental…
The Mythos AI model has achieved superhuman performance in cybersecurity, finding thousands of zero-day exploits that survived decades of human review, signaling the displacement of human researchers.…
On June 9, 2026, Anthropic released Claude Fable 5, the most capable AI model publicly available at the time, but access was cut off within 72 hours after U.S. government intervention. The underlying …