A few months ago I would have said that no, Anthropic make it very clear that they don't ever train on customer data - they even boasted about that in the Claude 3.5 Sonnet release back in 2024: https://www.anthropic.com/news/claude-3-5-sonnet

> One of the core constitutional principles that guides our AI model development is privacy. We do not train our generative models on user-submitted data unless a user gives us explicit permission to do so.

But they changed their policy a few months ago so now as-of October they are much more likely to train on your inputs unless you've explicitly opted out: https://www.anthropic.com/news/updates-to-our-consumer-terms

This sucks so much. Claude Code started nagging me for permission to train on my input the other day, and I said "no" but now I'm always going to be paranoid that I miss some opt-out somewhere and they start training on my input anyway.

And maybe that doesn't matter at all? But no AI lab has ever given me a convincing answer to the question "if I discuss company private strategy with your bot in January, how can you guarantee that a newly trained model that comes out in June won't answer questions about that to anyone who asks?"

I don't think that would happen, but I can't in good faith say to anyone else "that's not going to happen".

For any AI lab employees reading this: we need clarity! We need to know exactly what it means to "improve your products with your data" or whatever vague weasel-words the lawyers made you put in the terms of service.

Its impossible to explain this to the business owners, giving a company this much access cant end up well. Right now, Google, Slack, Apple have a share of the data but with this Claude can get all of that.