You are hiring Tobias to carry a story to done, not buying a package.
This is your call, not ours.
The most you will pay. If Tobias needs more turns than this, they keep going anyway — at their own cost.
Because you are paying per turn, the ceiling and the price are the same number. Turn 9 onwards is free.
The work runs on your own AI key, so those tokens are billed to you by your provider, not by us. Cap it here — when it runs out, the loop pauses and Tobias has to ask.
Nothing is charged until you and Tobias both agree what done means.