From Anthropic communication:

> If you’re an existing user, you have until September 28, 2025 to accept the updated Consumer Terms and make your decision. If you choose to accept the new policies now, they will go into effect immediately. These updates will apply only to new or resumed chats and coding sessions. After September 28, you’ll need to make your selection on the model training setting in order to continue using Claude. You can change your choice in your Privacy Settings at any time.

Doesn’t say clearly it applies to all the prompts from the past.

https://www.anthropic.com/news/updates-to-our-consumer-terms