Welcome to the Make community!
According to the discussion in this thread, How much do AI tools cost?, Make AI Agents are currently in closed beta, and there is no known launch date yet. Also, it is still unknown how much extra will Make charge for its use on top of the Organisation’s subscription.
Hope this helps! Let me know if there are any further questions or issues.
— @samliew
P.S.: Investing some effort into the Make Academy will save you lots of time and frustration using Make.