I will certainly revisit it as more information comes out, but is it your contention that Anthropic solved jailbreaking with Mythos?
That is a strawman. My contention is what you just implicitly acknowledged - there is not information put out yet to validate the quoted claim. There are claims to the contrary, as well, from Anthropic themselves.
What you claim contradicts Anthropic’s statements. I assume that is the contention.