Before you put sensitive information into ChatGPT, Claude, or any other AI tool, take a minute to review these privacy settings. This quick checklist can help you use AI more safely, especially if you handle client work, business information, or personal details. 1. Mostly use a business tier (minimum 2 seats). 2. Toggle off Data training in your settings. 3. Never use the thumbs up/down on any chats. 4. Never share a link to a personal account chat (not business). 5. Use Temporary Chat / Incognito for anything personal (it is still kept 30 days for safety and is never trained). 6. Turn off Memory (it is a second file on you, and it trains unless you toggle it off). 7. Delete the shared links you already created: Settings → Privacy → Shared Chats in Claude; Settings → Data Controls → Shared Links in ChatGPT. 8. If you use Codex, turn off the second switch in Codex Settings (training on full environments). The ChatGPT toggle does not reach it. 9. Never install a “ChatGPT in sidebar” browser extension. 10. Real secrets—health, legal, client work, unreleased IP—never go in a personal account at all. Business, API, or nowhere. Some points are sensible general caution, but a few are overly absolute; for example, you can use a personal AI account responsibly if you understand the service’s data settings and avoid putting highly sensitive information into it.