just assume yes

google has been found keeping information on you that they explicitly said they wouldn't. I can't recall the specifics. but apply that to any megacorp like this

Almost certainly.

They don't have to, since it's not a part of the system that it requires them to hold onto the information, but they all invariably hold onto the information to keep training on it, which includes your personal information.

They are likely not using for selling to other people or anything since that's not their business model at the moment, but it's probably finding it's way into the next version in some capacity.

If you're concerned about data retention, you'd want to select an inference provider that is listing 'ZDR' (zero data retention) as a feature.

For example, a lot of the Chinese open weight models have become quite capable and because their weights are available end up like generic vs brand name medicine where there's multiple providers serving them with different production conditions.

Because enterprise use will often be worried about data retention or sending data to China, the alternative providers usually offer things like US-only inference or zero data retention.

If you're not going to use it all that often, a la carte API use is going to be way cheaper than a subscription, probably better results than a free plan with a closed model provider, and give you more control over the process.

yes. if you still feel the need to do this, sanitize your inputs. strip it of all personal data. don't upload the whole file with metadata, paste the scrubbed text that you want rewritten in with the prompt.