EU cyber agency tests Mythos 5 and Astra

EU cybersecurity agency ENISA has been granted access to two frontier models—Anthropic’s Mythos 5 and OpenAI’s GPT-6 Astra—and is testing them, Reuters reported via CNA. The handover timeline says Mythos took more than three months from an agreement in principle while Astra access arrived within about a week of release; the public test scope and model configuration remain undisclosed. For builders, this turns safety claims into an external evidence path: treat regulator access and eventual findings as a governance milestone, not a benchmark result, alongside the archive’s Astra release-gate analysis.