UK gov's Mythos AI tests help separate cybersecurity threat from hype New model is the first AI system to complete a difficult multi-step infiltration challenge. https://arstechnica.com/ai/2026/04/uk-govs-mythos-ai-tests-help-separate-cybersecurity-threat-from-hype/?utm_brand=arstechnica&utm_social-type=owned&utm_source=mastodon&utm_medium=social