alt Hacker NewsBut there is evidence, the blog post says: "While unlikely, we cannot rule out that de-identified data derived from their usage of our products helped improve our models ."
In other words, yes, they had been using ChatGPT, and yes, ChatGPT could very well have trained on their data. Now that there is evidence, we need an investigation: yes or no, was it the case?
That is not an admission of malfeasance though? As I read it they don't know if anyone fed relevant private documents into the model under an account configured to permit training on user data.
If there's more to the story I'd be interested to hear it.