Per turn
The meter above the chat shows what the current turn and the panel have cost so far.
Budgets
Budgets (from Cmd K) sets limits for one panel, and per day for a project folder and a persona.
A task has its own budget.
Before a turn starts, the app estimates it from the recent turns and checks the limits; a turn that
would cross one is held and the panel says why.
Spend and Savings
Spend shows what your subscriptions and APIs cost this month, in one total. Savings shows the tokens the app kept out of Claude's context, by source.
Exchange rates in Spend are fixed until you press Update rates.
You can also set an amount above which a single turn asks before it runs, and the share of a limit at which the panel warns you.