Claude just gave me access to another user's legal documents (old.reddit.com)

From reading about it, it seems to me Claude is a very limited agent, but it’s optimizing how to get a high score on leaderboards. I suspect most people don’t realize their interactions with Claude, both via web app and API, are used for training, regardless of your account subscription status. But yes, you can opt out.

[dead]

There's a bot summary in the Reddit thread that claims that a hallucination was mistaken for a leak. It does seem likely.

An LLM generating a bunch of text is to be expected.