DuckDuckGo started showing AI results for me.
I think it uses the bing engine iirc.
And you can use multiple models, which I find handy.
There is some stuff that AI, or rather LLM search, is useful for, at least the time being.
Sometimes you need some information that would require clicking through a lot of sources just to find one that has what you need. With DDG, I can ask the question to their four models*, using four different Firefox containers, copy and paste.
See how their answers align, and then identify keywords from their responses that help me craft a precise search query to identify the obscure primary source I need.
This is especially useful when you don’t know the subject that you’re searching about very well.
*ChatGPT, Claude, Llama, and Mixtral are the available models. Relatively recent versions, but you’ll have to check for yourself which ones.