The cost of the GPT-4 API is ballpark around $0.05 / 1000 tokens. If you want to include a rolling context window, you will easily hit 1000+ tokens if not a huge amount more. ChatGPT pro gives you 50 GPT-4 queries every three hours. If you're using it all day you might average about 100 daily queries. Using a dedicated GPT4 API would run you approximately five dollars a day for the same thing - that's $150 a month as opposed to flat cost of $20.
Brand. People prefer things they’re familiar with and things that people they personally know also use, they intuitively feel that they’re less likely to have a bad experience with those. And that’s generally true. Many more people have friends who use chatgpt plus than have friends who use the gpt playground or an open source ui.
Fixed fee will be preferable for some. The risk of it being unexpectedly high may outweigh the benefit of an average lower cost.
Access to plugins plus the official iOS app.
The biggest reason is the familiarity with the brand and because they’ve heard of chatgpt plus from many places, but they haven’t heard of these other options. Plus for most people, the idea of getting an api key and all of that is going to be a little intimidating.
Overall, if it was any family member of mine I’d recommend that they used chatgpt plus rather than getting an api key.
Personally I use the gpt playground, but I also recognize that to 99% of gpt users that’s inferior, even though I significantly prefer it myself.
$20 is a flat rate. How much would I spend on the API?