much harder to do in OP's case, matching flavour then referencing that specific companies name when asked how it know to flavour this way? thats astronomically low for randomly selected plausible tokens without some data prior, like that companies codebase.

My own experience is opus being lousy at an extremely niche math task, but it was still easier for me to describe what it needed to do to get code and correct issues in its reasoning/working than to write myself. a minor model number change later and it's nailing everything, despite my opt-out. Its is astronomically unlikley others were working on this also, especially at that level, especially this application.

so, safe to say they _all_ train models on chats, the only difference being if you "opt out" you at least have some defence later when they steal your work and claim it as their models original output.