I've also had bad results with hallucinations there. I was trying to learn more about multi-dimensional qubit algorithms, and spent a whole day learning a bunch of stuff that was fascinating but plain wrong. I only figured out it was wrong at the end of the day when I tried to do a simulation and the results weren't consistent.

Early in the chat it substituted a `-1` for an `i`, and everything that followed was garbage. There were also some errors that I spotted real-time and got it to correct itself.

But yeah, IDK, it presents itself so confidently and "knows" so much and is so easy to use, that it's hard not to try to use as a reference / teacher. But it's also quite dangerous if you're not confirming things; it can send you down incorrect paths and waste a ton of time. I haven't decided whether the cost is worth the benefit or not.

Presumably they'll get better at this over time, so in the long run (probably no more than a year) it'll likely easily exceed the ROI breakeven point, but for now, you do have to remain vigilant.