The UK gov disagrees with you:
https://arstechnica.com/ai/2026/04/uk-govs-mythos-ai-tests-h...
https://www.aisi.gov.uk/blog/our-evaluation-of-claude-mythos...
AISI did also say that GPT-5.5, which has been public for months, scores basically the same as Mythos on their cybersec evaluation. But there wasn't as much media about about that for some reason.
https://www.aisi.gov.uk/blog/our-evaluation-of-openais-gpt-5...
Government of the least mismanaged country in the world?
alt Hacker News
AISI did also say that GPT-5.5, which has been public for months, scores basically the same as Mythos on their cybersec evaluation. But there wasn't as much media about about that for some reason.
https://www.aisi.gov.uk/blog/our-evaluation-of-openais-gpt-5...