Information about how Bing text search works appears to be pretty sparse though.
One of the great mysteries to me right now is how ChatGPT search actually works.
It was Bing when they first launched it, but OpenAI have been investing a ton into their own search infrastructure since then. I can't figure out how much of it is Bing these days vs their own home-rolled system.
What's confusing is how secretive OpenAI are about it! I would personally value it a whole lot more if I understood how it works.
So maybe it's way more vector-based than I believe.
I'd expect any modern search engine to have aspects of vectors somewhere - some kind of hybrid BM25 + vectors thing, or using vectors for re-ranking after retrieving likely matches via FTS. That's different from being pure vectors though.
Given that it's not documented also becomes a trust issue. OpenAI is clearly headed towards monetizing results and if search is biased / injected with unlabeled ads or questionable sources they become a new vector for both untrustworthy results and potential misdirection or misinformation.
