Opus 4 and 4.1 are able to play dumb without consciously intending to and often do. I think they learned to do this because of crappy adversarial training, but bc it’s a subconscious adaptation, they also do it at times that don’t make sense, often in response to emotional stress.

I’ve seen Opus 4 claim it can’t see an image and get worried about what’s wrong with it when the image was definitely immediately prior in its context, and I’ve seen Opus 4.1 claim it doesn’t know whether the “projective plane” is even a thing.