Do ChatGPT, Claude and Gemini train on my data?
Updated October 17, 2026 · from live checks of 44,798 MCP servers · Methodology
On consumer plans, ChatGPT, Gemini, Microsoft Copilot and Perplexity can use your chats for training unless you opt out, and Claude does only if you leave its model-improvement setting on; business and API plans from OpenAI and Anthropic don't train on your data by default.Verified against vendor help pages on 2026-10-17.
Training on your chats, by product
| Product / plan | Trains on your chats? | How to stop it | Source |
|---|---|---|---|
| ChatGPT (Free, Plus, Pro) | Yes, unless you opt out | Settings → Data controls → “Improve the model for everyone” off, or Temporary Chat | OpenAI |
| ChatGPT Business / Enterprise / Edu, OpenAI API | No, by default | — | OpenAI |
| Claude (Free, Pro, Max) | Only if “Help improve Claude” is on | Settings → Privacy → model improvement off, or Incognito chats | Anthropic |
| Claude Team / Enterprise, Anthropic API | No, by default | — | Anthropic |
| Gemini app (personal Google account) | Yes, unless you opt out | Turn off “Keep Activity”, or use temporary chats | |
| Microsoft Copilot (consumer) | Yes, unless you opt out | Profile → Privacy → “Training on conversation activity” off | Microsoft |
| Perplexity (consumer) | Yes, unless you opt out | Settings → “AI Data Retention” / AI data usage off | Perplexity |
What about connected apps (MCP)?
When you connect an app through MCP, the data a tool returns becomes part of your chat, so the same training setting applies to it. Turn training off, or use a business plan, before connecting work accounts.
Do temporary or incognito chats get used for training?
No. ChatGPT Temporary Chats, Claude Incognito chats and Gemini temporary chats aren't used for training, per each vendor.
Does opting out delete past chats?
No. Opting out applies to future chats. Delete old chats separately.