Does ChatGPT train on your data?

The short answers

Summarized from each provider's own help and privacy pages as of October 14, 2026. Policies change, so check the provider's current settings before relying on this. ChatGPT (Consumer chats used for training?: Can be, unless you opt out; How to stop it: Turn off model improvement in Data Controls, or use Temporary Chat). Claude (Consumer chats used for training?: Depends on the choice you made in Anthropic's training setting; How to stop it: Turn the training setting off in Privacy settings). Gemini (Consumer chats used for training?: Can be, while Gemini Apps Activity is on, and reviewers may read samples; How to stop it: Turn off Gemini Apps Activity). Quad (Consumer chats used for training?: Never, on any plan; How to stop it: Nothing to change). Business, enterprise and API plans from these providers generally exclude your data from training by default. The question matters most for free and personal accounts.

Training, retention and temporary chats

Training means your chats may be used to improve future models. That is what opt-out settings control. Retention means how long the provider keeps your chats on its servers. Turning off training does not always shorten retention, and temporary or incognito chats are often still kept for a period for safety review. Human review means people at the provider may read samples to improve quality or enforce rules. Check whether it applies to your plan. A private setup needs all three handled: no training, no provider retention and no human review of your chats.

What Quad promises, exactly

Quad never uses your chats or files to train AI models, on any plan, free included. Quad never sells your data and never shares workspace content with advertisers. 47 of 51 chat models run on the Private Lane, which sends chats only to providers under a Zero Data Retention agreement. The other 4 ask you to confirm before you use them. Chats and files are encrypted in transit and at rest, and you can export or delete them yourself. Incognito chats stay out of your history and skip memory, and their temporary data is deleted within an hour. Quad stores your history, encrypted, so it can sync across the web, desktop and phone apps. That makes Quad private, not anonymous, and it is not end-to-end encrypted. The model you pick still reads your prompt in order to answer. See the private AI chat page for where privacy stops.

Use the same models without the training

Quad lets you use GPT-6, Claude, Gemini, Grok and DeepSeek in one app. Your chats never train a model, Quad never sells them, and Private Lane models run under Zero Data Retention agreements with the providers, so the provider keeps nothing after answering. Ask once and switch models in the same conversation. Start free with 100 credits a month, or try guest chat with no account. Use Incognito for chats you do not want in your history at all. Compare the private options on the Duck.ai, Lumo and Venice pages, or read encrypted AI chat, explained.

Frequently asked questions

Does ChatGPT use my conversations for training?

On consumer plans it can, unless you turn off model improvement in Data Controls or use Temporary Chat. Business and API data are excluded by default, per OpenAI. Check OpenAI's current settings.

Does Claude train on my chats?

Anthropic asks consumer users to choose whether their chats may be used to improve its models, and you can change that in Claude's privacy settings. Commercial and API plans are excluded, per Anthropic.

Does Gemini train on my chats?

While Gemini Apps Activity is on, Google may use your chats to improve its products, and human reviewers may read samples. You can turn the activity setting off in your Google account.

Is there an AI chat that never trains on my data?

Yes. Quad never uses your chats or files to train AI models, on any plan, free included, and runs most models with Zero Data Retention at the provider.

Does temporary or incognito chat stop training?

Usually it stops training and history, but providers may still keep those chats for a short period for safety review. In Quad, Incognito data is deleted within an hour.