Then go ahead and add a payment method and purchase $5 or more in prepaid credits. Your usage limit will be increased beyond “free tier”, and any free credit will still be employed first while it is unexpired or unexhausted.
But the issue I’m having is when I try to add a payment method I get a “Slow down, too many request” message. That might not be the exact wording but something very close to that. I’m going to try it again in about 20 minutes.
The free trial period begins upon creation of the whole OpenAI account, and only applies to the first account created per phone number.
It can be a situation for many that you’ve been using ChatGPT, and created your OpenAI account just for that, and only later discovered the API after the credit had expired. ChatGPT came after API, allowing an OpenAI account to do something else, and then became how most people create an account.
You can check your “usage” page at platform.openai.com, and there is a display on the right that would show if the particular account was granted a trial, and if so, the amount that expired. (expired=pink)
OpenAI sort-of acknowledged this happens, but the fastest rectification is to just put in $5 of paid credit yourself.