Your conversations, uploads, and custom instructions.
Consumer accounts are opted in. Team, Enterprise and API traffic are not.
Conversations, uploaded files, and custom instructions, to improve the models. Team, Enterprise, and API traffic are excluded by default. Consumer accounts are not.
It is forward-looking. Conversations already used in a completed training run are not recalled. Deleting a chat removes it from your history and from future training use, but not from a model that has already been trained.
The toggle's test id changes. Fall back to matching the visible label text "Improve the model for everyone" and read the switch's aria-checked attribute.
Every service on that list buries its opt-out somewhere different. Don't Train On Me puts all of them in one checklist in a panel beside your browser, walks you through them one at a time, and helps you confirm your privacy settings on the ones that expose a setting it can read. Free, no account, and nothing you tick leaves your machine.