We don't yet know... but we know ... ITS A SHEET TON!
Averaging 1 article a min (after article data is ready). Easily 100 to 150 articles in a couple hrs!
Roughly we calculated that the sheets and a group can do 30,000 in a month.
This means that you could provide 300+ websites with 2 pieces of content a day.
Shoud be reasonable to build 500 articles a day, linked and posted to site for scheduling.
It still will take work, editing, reviewing, but its far more managible now.
The tool can be set to run over night.
Keep in mind there is no seat limits to the sheets. Make additional copies and build faster.
Reach out to OpenAI to increase your limits if you need to build higher than your account limits.