I used Bing to get coordinates for every postal code in the British postal system. As long as I didn’t ask for too many at once, it would give it to me in a convenient table. And each one seems to have been accurate, at least for the ones I checked.

But on the other hand, I tried asking it to look up some Pathfinder homebrew, and even though it could give me the link to the exact document I wanted, and it definitely saw the content, it was absolutely incapable of giving accurate information. It would give statblocks that were formatted correctly but had the wrong numbers, and abilities that either shouldn’t be there at all, or with the right name but the wrong rules, either because it made up a plausible sounding entry or because it was bringing in the d&d version. I even tried asking it to tell me about a series of feats in one of these documents, and it would make up its own feats that matched the naming scheme instead of giving me the feats in the document it was referencing.

The inability to reliably quote things is a bit of problem for something that wants to be a search engine.