Based on the article here, and Firefox's mythos article, they had found bugs with Opus 4.6 as well but mythos is finding more that it missed.
That would align with the curl feedback you linked, they aren't using mythos but are finding bugs with other models. Presumably the expectation would be that with mythos they'd find more that were missed by other models already used.
> Based on the article here, and Firefox's mythos article, they had found bugs with Opus 4.6 as well but mythos is finding more that it missed.
It's not quite apples-to-apples. It was Opus on Firefox 148, Mythos on 150. A better test of Mythos vs Opus would have been to apply Mythos to Firefox 148. Or also re-apply Opus to Firefox 150.
Do we know all the Opus+Firefox 148 bugs are fixed in Firefox 150? Do we know the number of new bugs introduced per Firefox release?