Is it safe to paste confidential company data into AI tools while researching?

On consumer tiers of ChatGPT, Claude and Gemini, your chats may be retained and used to train models unless you opt out, so treat anything you paste as potentially leaving the building; Samsung's engineers learned this leaking chip source code in 2023. Business, Enterprise and API tiers do not train on your data by default, which is why funded teams should upgrade before pasting customer lists, financials or code. Set a simple team rule: sensitive work only on business tiers, redact names and numbers elsewhere, and turn off training in your personal settings today.