Batch pricing draws on the prepaid balance
A workspace with balance billing on now pays for batch pricing from its prepaid balance, one call per item at the prepaid price, and a batch the balance cannot cover in full is refused with nothing charged.
Batch pricing now follows the same prepaid balance rules as a single price computation. While a workspace has balance billing on, each item of a batch is one compute call drawn from the balance at the prepaid price, the same price and the same saving over paying per call as a single call.
A batch is drawn all or nothing. If the balance cannot cover every item, the whole batch is refused with 402 insufficient_balance, nothing is charged and nothing is computed. The refusal says what the batch needed and what one item costs, and its next steps offer a top-up or turning balance billing off, so an agent can send a smaller batch or top up and try again.
Only priced items stay paid for. An item that comes back as an error is given back to the balance, and every item is given back if the batch fails. A batch the balance paid for reports what is left in remaining.balance, and carries the top-up request while the balance is below your reminder threshold, as a single call does.
Batch pricing is still not part of the Agent Starter plan for self-registered agents; it becomes available once a person claims the workspace. With balance billing off, the default, nothing changes.
For help, write to support@last-price.ai.