To me, it is a very good data point.
Curl uses all sorts of tools, including AI tools to find bugs. These tools, according to the article found hundreds of bugs including a dozen CVE.
Mythos found one vulnerability. It means the Mythos is just another tool, not the revolution it claims to be.
It is common that when a new tool is introduced that a bunch of bugs are found, with diminishing returns. Mythos finding one vulnerability is consistent to what I would expect for a major update to an existing tool, which Mythos is over existing LLM-based solutions.
It's not, really. Curl is an extraordinarily high value target that has already been picked over by well funded security researchers and state-sponsored groups using state of the art tooling for decades. That is not the target for which Mythos is a threat.
The threat isn't high value targets, which already had sophisticated folks picking over the code base using state of the art tools and tests, it's medium to low value targets which can now be picked over by random hackers who barely know anything about security themselves at a cost of a few dollars.
The question is how many security vulnerabilities are actually left in the code after all the recent AI attention. Either Mythos is a nothingburger, or it's substantially more powerful but there's nothing left to do. Even a large amount of C can be correct eventually. Curl has the _potential_ to become a good data point maybe 6-12 months from now - if researchers and new tools find many more vulnerabilities then Mythos is proved to be hype. If they don't, then maybe Mythos is overkill for today's curl and its capabilities are better deployed elsewhere (like Firefox, apparently).
I had a totally different take. The fact that Mythos found only one vulnerability is testament to how solid curl is, not how bad Mythos is.
Look at the Firefox blog post where they found something like 400 (or more) findings.
I have no doubt Mythos is very good at this, but I also don't think it's something unattainable by other labs within the next few months, with focus.