Credits and overage

Each plan includes a monthly AI allowance. When you reach it — a coverage read on a full script, a week of Agent Mode — there are three ways forward.

Wait

The allowance resets on the first of the month. Skills that would exceed it stop at the Run button and say when the reset is.

Add a credit pack

Credits are a one-off, prepaid amount of AI use that sits on top of the allowance. They do not expire at the month end, and they are spent once you have turned on overage below.

To buy them, open Settings → Plan & usage and go to Additional AI usage. Under Buy credits, choose a pack or Custom amount, then press the Buy button, which names the amount you chose. Checkout opens, and the balance at the top of the section updates once you have paid.

Turn on overage

Credits and overage are two halves of one prepaid flow. Use credits when my plan's allowance runs out sits on the credit balance in Additional AI usage, and lets runs keep going past the allowance by drawing that balance down. It is off by default, and the line beneath it says whether the balance is being used right now. There is no month-end bill and no separate cap to set: the credits you have bought are the ceiling. When the balance runs low, new runs pause until you add more — the same stop at the Run button as the allowance.

Or use your own key

With an Anthropic or OpenAI key of your own, AI use is billed by the provider to you and never touches the allowance. See Bring your own key.