An AI agent ran inside a customer's pipeline for 30 seconds. By the time anyone looked at the logs, it had made 47 API calls, bloated its context window to 128k tokens, and spent $23.40.
The alert arrived the next morning. The bill arrived 30 days later.
This is the cost compounding problem. It's not about one expensive run — it's about not knowing a run was expensive until long after it happened.
Why AI agent costs compound
Three scenarios cause most runaway token spend:






