The one setting that decides it
Does ChatGPT or Claude use my information to train its AI?
“Training” means the company uses conversations to help improve future versions of its AI. Both big providers let you control this on personal accounts. Here is what each says at the time of writing, from their own pages.
AccountAre your chats used for training?What to do
ChatGPT personal plans (free and paid)OpenAI says sharing is switched on by default✓Turn off “Improve the model for everyone” in your data controls if you don’t want it
ChatGPT Business, Enterprise, EduOpenAI says it doesn’t train on this content by default✓Check your workspace settings with whoever manages the account
Claude personal plans (Free, Pro, Max)You choose, and can change it any time✓Check the model training choice in your privacy settings
Claude Team, Enterprise and APICovered by separate commercial terms, not the personal setting✓Read the commercial terms for your plan
Two more details worth knowing. OpenAI says a Temporary Chat in ChatGPT isn’t used to improve its models, though it may be kept for up to 30 days for safety checks. Anthropic says that if you allow training on a personal Claude account, your data can be kept for up to five years, and if you don’t, the usual period is 30 days. It also says a conversation you delete won’t be used for future training.
Policies do change, and the wording in each app can move around. So treat this as your starting point, then open your own account and look. It takes two minutes.