One balance, no subscription.
Sweet is pay as you go. New accounts get $5 of free credit. After that you top up whenever you need more: nothing renews and nothing is charged automatically.
Your balance pays for two things while an agent works: the AI model doing the thinking, and the sandbox it works in. An asleep agent costs nothing.
What it costs.
| Model use, per million tokens | Price |
|---|---|
| Input | $0.60 |
| Cached input (repeated context) | $0.012 |
| Output | $2.40 |
| Sandbox, while awake | Price |
|---|---|
| Standard sandbox (half a CPU, 2 GB memory), billed by the second | about $0.24 an hour |
Most of the cost is the model. Most of an agent's input is repeated context, which is charged at the cached rate.
From $5, any amount.
Add any amount from $5 to $1,000, from the chat or your account page. Checkout is by Stripe.
Your first top-up also lets up to five agents work at once instead of one.
You'll see it coming.
Under $1 left, a note appears with a one-click top-up. If the balance reaches zero, your agents pause with their work saved, and carry on where they stopped as soon as you add credit.