I'm quite a big fan of perplexity AI, which shows you sources it used to generate the answers. One thing I often do is type a question, glance the automated answer and then jump to the source to see what the users said (basically I use it like a tailored search engine)

Admittedly, there's nothing stopping the company from throwing up fake sources to "legitimize" their answers, but I think that once models become more open (e.g. AMD's recent open weights addition is an amazing leap forward) it will be harder to slip in fake sources