Using Kagi's FastGPT I was given a reference to a two-week-old HN comment.
(Which, it turns out, I'd authored...)
I'm not sure if that's part of the training database, or something which turned up as FastGPT conducted its own Web search. But it was surprising in at least two regards.
Their API (for third-party devs) used to have an option for FastGPT to either allow or disallow web-search but they removed the option that disallowed it. So the API always uses web-search.
This doesn't mean that the FastGPT web client behaves the same, but I would suspect it.
(Which, it turns out, I'd authored...)
I'm not sure if that's part of the training database, or something which turned up as FastGPT conducted its own Web search. But it was surprising in at least two regards.