I wonder how well Apple has deployed these tools internally for security research.
Since mid-April Chrome showed 302 vulnerabilities patched, 225 of them found by Google. Same period last year was 19 vulnerabilities. They've also become more transparent recently, disclosing vulnerabilities found internally, not just externally (which Apple still doesn't appear to do). From the outside, it's hard to tell if Apple has deployed this tooling as much as Google.
I'd guess they haven't even begun to really utilize them. They've never been a terribly security conscious company, despite the marketing.
I am part of Apple's SEAR (Security Engineering and Architecture) organization and can’t attest that we have been using Anthropic models, including, but not limited to, Mythos, as part of our participation in Project Glassing and previous private partnerships with different frontier AI labs for years. We simply don’t talk about it because there’s no benefit to talk about it, and also NDA’s, but mostly because there’s no benefit to talk about it other than to satiate people’s curiosity about what we do or don’t do internally.