Most companies forbid it though, since you're not covered by any legal protection - for example, Anthropic can use your data or code to train new models and more.

This maybe was the case year+ ago but this is no longer the case, used to be most; now it is some/few

Any references on this? I hear this argument a lot. In fact, in a talk on AI last week I heard someone say:

"If you click the thumbs up button to rate a chat, the AI provider will use the contents for training, so our company's policy is never to click the thumbs up button"

That seemed so farcical I had a hard time taking this person seriously. Enterprise plans must give some strong guarantees around data usage, right?