I really like the way this has been added to the UI. It's off to the side so I can just use DDG as God intended if I want to, but also is distinct enough that I discovered it prior to seeing it on HN. It makes it clear this is done in a DDG private way (which is one of the things I'm wary about with ChatGPT on its own) and offers multiple models/vendors in one place.

Pretty good! Thumbs up from me.