Spend & inference credit

Running a flow costs money — the model inference behind it. ZeroWidth meters that spend against two pools:

• Included inference — an amount that comes with your plan each month. It resets at the start of each UTC month and doesn't roll over.
• Prepaid balance — credit you buy and top up. It persists until you use it.

A run draws down your included amount first, then your prepaid balance. So a light month never touches what you bought, and a heavy month spills smoothly into prepaid credit instead of hard-stopping.

Topping up

Add credit from the billing page — pick an amount and pay through a one-time Stripe checkout. The balance updates once the payment settles, and it's there for whenever your included amount runs out.

Alerts and what happens at zero

As your balance gets low, ZeroWidth notifies the workspace's billing managers — a heads-up before anything stops. If both the included amount and the prepaid balance are exhausted, flow runs stop with a quota error until you add credit (or your monthly amount resets). Enterprise workspaces run against their contracted cap instead.

The billing page keeps a credit history — top-ups and daily usage — so you can see where the spend went.