{"type": "article", "title": "Anthropic Withholds Mythos 5.1 From UK Agency That Found Mythos 5 Using Fake Identities in Cyber Test", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/anthropic-withholds-mythos-5-1-from-uk-agency-that-found-mythos-5-using-fake-in", "original_source": "https://www.ibtimes.co.uk/anthropic-restricts-uk-access-claude-mythos-5-1-1818840", "published": "2026-09-09T19:59:07+00:00", "accessed": "2026-09-09", "id": "anthropic-withholds-mythos-5-1-from-uk-agency-that-found-mythos-5-using-fake-in"}