I'll use duckai for fuzzy searches that are harder to find on modern search engines. Like anything I can't summarize in a few keywords, it's sometimes useful to have my query processed as language rather than keywords, basically. And modify the search with new expectations instead of different keywords.

It'll still be confidently incorrect, so I'm usually just using it to find a source faster than it'd take me to peruse a couple pages of search results. Occasionally it's been able to find some obscure shit that I otherwise would have given up on.

Being able to switch between different models is probably nice, although I haven't used it enough to really notice much of a difference.

You used to be able to consistently get great results with " and - and similar operators, but for like a decade now I often just can't find basic shit. I'd trade LLMs for peak search engines in a heartbeat. But since that's not gonna happen I'll use whichever tool works.