For what it's worth, I think it's clear that Feynman was, at the very least, what-we-nowadays-tend-to-call-sexist. That is, he saw women as sex objects and talked about them as sex objects, and so far as I can tell saw nothing wrong or improper about doing that. See, e.g., That Chapter of "Surely you're joking...", a bit of which is quoted in the article. (The article's decontextualization makes it look worse than it actually is, but it's still not great.) It's harder to tell whether he was sexist in the narrower sense of thinking that women are generally e.g. intellectually inferior to men. I'm pretty sure he wasn't sexist in the even narrower sense of thinking that women simply can't do the things that traditionally used to be men's jobs.
[1] Making a guess on the basis of username.