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Credits and machines
What a thread costs: plans, top-ups, machine sizes and per-second billing.
Statefold charges for one thing: the machine your thread runs on, per second, while it runs. Model tokens are never charged by Statefold; they come from the subscription or API key you connect.
How credits work
A plan buys credits each month. Plans are $10, $50, $100 a month, and each gives credits equal to its price. Top-ups start at $10. Checkout shows the price and any tax before you pay.
- Monthly credits are used first and expire at the end of the period.
- Purchased credits carry over for the lifetime of your account and stay usable without a plan.
- There are no automatic top-ups or overage charges. Plans renew until you cancel. Prices are in USD.
New accounts get a one-time $3 starter credit, one per linked GitHub account: about 10 hours on the default machine.
Machine sizes
Every size draws on the same balance at its own hourly rate, billed per second.
| Size | vCPU | Memory | Disk | Rate |
|---|---|---|---|---|
standard-1 | 0.5 | 4 GiB | 8 GB | $0.10 / hour |
standard-2 | 1 | 6 GiB | 12 GB | $0.20 / hour |
standard-3 (default) | 2 | 8 GiB | 16 GB | $0.30 / hour |
standard-4 | 4 | 12 GiB | 20 GB | $0.55 / hour |
Choose the default size in Settings → Machines, and override it per project there. A thread keeps the size it started with. If a workspace runs out of memory, thread details show the largest processes and offer Move to bigger machine. standard-4 is the largest size; on it, run less at once.
When you are charged
- A running workspace uses credits even while the agent waits. A sleeping one uses none.
- A workspace sleeps about ten minutes after the agent goes idle. Keeping the thread or terminal open does not keep it running.
- Starting a machine needs at least one minute of credit at the largest size's rate. Short reservations are held apart from your balance and come back after a confirmed stop.
Where to see usage
Settings → Billing shows your balance and usage for the current period (the UTC calendar month when you have no plan): running time, machine costs and the threads that cost the most. Usage that is not tied to a thread still counts in the total. Payment methods and invoices are in the billing portal linked from that page.