I wonder if opus 4.8 would also be able to fix the code too

In my experience, most models are pretty good at finding security vulnerabilities and fixing them. I can run GLM-5.2, Kimi K2.7, or even a Mistral model, and it'll find issues and propose reasonable fixes.

My impression is that Anthropic's point about Mythos is that it is uniquely good at finding vulnerabilities and then using them to create working exploit chains.

	▲	zozbot234 4 hours ago \| parent [-]
		Exactly. Which is somewhat helpful for cyber defense because it helps prioritize fixes for those bugs that are in fact involved in a viable exploit chain. But it makes sense that one would want to restrict the ability of building those until the vulnerable software has been comprehensively fixed. There is some meaningful evidence that Fable is fine-tuned or steered away from helping on this very task, which is not something that can be feasibly circumvented by a basic jailbreak.