It would be interesting to run this same analysis using Claude 3 Haiku, which is 1/40th of the price of GPT-4o. My hunch is that the results would be very similar for a fraction of the price.
I was thinking the same, would love to hear the author's reasoning for going with gpt-4o. In my experience, anything above gpt-3.5-turbo is overkill for data extraction.