If I made an LLM, I would also claim it is so good I can't give it to the general public.
It's a great way to hype up your product while also making yourself look reasonable and caring.

https://web.archive.org/web/https://www.nytimes.com/2026/04/07/technology/anthropic-claims-its-new-ai-model-mythos-is-a-cybersecurity-reckoning.html