I am looking for advice on GPTs related to marketing content

Hi

I am looking for advice on using GPTs to get marketing advice and create marketing related content.

I see quite a few GPTs that do this, and I am not sure which I should pick.

Also, does anyone have any thoughts on if these GPTs are actually better than the results you get using o3 mini-high? I figure if the GPTs are using 4o they may actually be worse than using the latest model.

Thank you for the help

Will