No for what? The opt-in for model training? About a year ago Anthropic changed "Allow use of your chats and coding sessions to train and improve Anthropic AI models" to default to on: https://www.anthropic.com/news/updates-to-our-consumer-terms
Or do you mean the feedback stuff? Their KB article at least seems to contradict that.
No it's opt-in now. Yes they nag you and might ask you if they can use your transcript to train on but you have to agree to it and it's something you can disable.
That's good if true. When did it change? I very much do remember that back when the change happened the modal I received didn't actually say anything (https://news.ycombinator.com/item?id=45064212) and thus I was by default opted-in until I saw the news and went to disable it, fortunately before the training actually started.
I'm not sure but I had this same conversation with CC just days ago and it told me to check my settings because it changed. My account is 4 months old and it was disabled so I assume it's been opt-in for at least 4 months.