ChatGPT

Compliant with caveats

openai.com

we may use Content you provide us to improve our Services, for example to train the models that power ChatGPT. Read our instructions on how you can opt out of our use of your Content to train our models.

Data Practices Disclosure

Trains on user data: Yes
Data retention: Personal Data retained as long as needed to provide Services or for legitimate business purposes including resolving disputes, safety, security, and legal compliance. Specific retention periods vary by data type: user-deletable data removed within 30 days of deletion request unless retention needed for safety/legal reasons; Temporary Chats auto-deleted within 30 days unless safety/legal reasons require retention; some data retained longer for security, safety, or legal reasons.
GDPR mentioned: Yes
Reviewed by a human: Yes

Sources

https://openai.com/policies/row-privacy-policy/