Understanding API limits and free tier

I’d like to give the API a try but I run into the following when I try to hit the gpt-3.5-turbo model with a curl (following the instructions here):

    "error": {
        "message": "You exceeded your current quota, please check your plan and billing details.",
        "type": "insufficient_quota",
        "param": null,
        "code": "insufficient_quota"

This is my first time using the API so I figured the free tier would allow me to try it out. According to this post it seems like I should be able to. Perhaps I’m misunderstanding this.

Does the trial actually require me to add funds? If so, why is it called a free tier and what is “Free trial users: 20 RPM 40000 TPM” on the page I linked referring to?

Thank you.

Welcome @michaelchase

You’ll only be able to use it if you have active credit grant(s). You can check yours here, it should show on the right side.

If you don’t have a grant, you’ll have to add a payment method and load credits.

If that doesn’t work contact OpenAI