I find one thing it doesn't do very well is avoiding marketing articles pushed by a brand itself. e.g. if I search is X better than Y, very likely landing on articles by makers of brand X and Y and not a 3rd party reviewer. When I manually search on Google I can spot marketing articles just by the URL.

Have you tried that with GPT-5 Thinking or is this based on your experience with older versions of ChatGPT + search?