I did exactly that with a custom GPT and it works pretty well. I did my best to push it to respond with its training knowledge about brand reputation and avoid

I did exactly that with a custom GPT and it works pretty well. I did my best to push it to respond with its training knowledge about brand reputation and avoid searches. When it has to resort to searches I pushed it to use trusted product information sources and avoid spammy or ad-ridden sites. It allowed me to spot the best brands and sometimes even products in verticals I knew nothing about beforehand. It’s not perfect but already very efficient.