I don't use Phind for coding, except occasionally, but I like it best for generalised tech search because each para has a reference and there's a list of references down the side -- often the references would really be sufficient for me on their own.

I've had one glaring error, I can't quite remember the details, but it switched the names/characteristics of two different processes (ie was exactly opposite in what it said); it was something to do with instruction caching and TLB, IIRC. I assumed you'd was a problem with the input corpus not allowing antonyms to be disambiguated.

Anyway, for me it's the best of the LLM tools I have access to and had mostly replaced search engine (Google, Dukgo) for my tech-related work.

I've only used chat.openai.com (free), bing chat, HuggingChat.