OpenAI Mistral AI
On what the policies say, Mistral AI is the better choice for your data: graded C against OpenAI's D.
OpenAI
ChatGPT trains on your content by default on Free, Plus and Pro, with an opt-out that binds new conversations only. Business and API do not train by default.
Verdict
D
- Trains on you by default
- A self-serve opt-out exists
- On by default. An opt-out exists, but you have to go looking for it.
- 5 Oct 2026
Mistral AI
Mistral does not train on your data "except (a) when you have not opted out" — a double negative meaning it trains by default. The switch is real, named, and in your account settings.
Verdict
C
- Trains on you by default
- A self-serve opt-out exists
- On by default, and the product tells you so. One switch, in settings, on every plan.
- 5 Oct 2026
OpenAI: every plan
OpenAI · what each plan can refuse · checked 5 Oct 2026
Free, Plus & Pro (ChatGPT consumer)
YES
Self-serve toggle
Not stated
Not stated
Unknown
32 / 50
On by default, with a way out
15 / 33
One switch, but the policy never says which way it ships
0 / 4
No paywall on the control
0 / 4
One kind of data is in scope
2 / 4
The policy does not say whether people read it
2 / 2
Nothing is said about de-identification
Business, Enterprise & API
NO
Nothing to switch off
Not stated
Not stated
Unknown
13 / 50
Training happens only if you opt in
0 / 33
Nothing is on, so nothing needs refusing
0 / 4
No paywall on the control
1 / 4
2 kinds of data are in scope
2 / 4
The policy does not say whether people read it
2 / 2
Nothing is said about de-identification
Free, Plus & Pro (ChatGPT consumer)TRAINS: YES
- Self-serve toggle
- Not stated
- 51 / 100
- Not stated
- Unknown
Business, Enterprise & APITRAINS: NO
- Nothing to switch off
- Not stated
- 18 / 100
- Not stated
- Unknown
Mistral AI: every plan
Mistral AI · what each plan can refuse · checked 5 Oct 2026
Consumer accounts — European Union
YES
Self-serve toggle
Not stated
Not stated
Unknown
32 / 50
On by default, with a way out
0 / 33
One switch, and the policy says which way it ships
0 / 4
No paywall on the control
2 / 4
3 kinds of data are in scope
2 / 4
The policy does not say whether people read it
2 / 2
Nothing is said about de-identification
Consumer accounts — rest of world
YES
Self-serve toggle
Not stated
Not stated
Unknown
32 / 50
On by default, with a way out
0 / 33
One switch, and the policy says which way it ships
0 / 4
No paywall on the control
2 / 4
3 kinds of data are in scope
2 / 4
The policy does not say whether people read it
2 / 2
Nothing is said about de-identification
Consumer accounts — European UnionTRAINS: YES
- Self-serve toggle
- Not stated
- 38 / 100
- Not stated
- Unknown
Consumer accounts — rest of worldTRAINS: YES
- Self-serve toggle
- Not stated
- 38 / 100
- Not stated
- Unknown