Tell HN: Gemini trains on chat history, even for subscribers (personal accounts)

According to Google’s support documentation, the Gemini app’s "Keep Activity" setting determines whether saved chat history is used to improve Google services, including training generative‑AI models. For personal accounts that subscribe to the paid Gemini service, the default setting allows all stored conversations to be employed for training unless the user disables the setting or opts for temporary chat sessions. The documentation also states that a subset of chats may be reviewed by human reviewers, and that these reviewed chats are retained for up to three years even if the user later deletes their activity.

Google warns users not to enter confidential information they would not want a reviewer to see or the company to use for model improvement. To prevent Gemini from training on personal chat data, users must turn off the "Keep Activity" option in the app’s settings, which consequently limits chat retention to 72 hours. The information highlights that a paid subscription does not automatically exempt users from having their data used for training.