How an AI Agent Ran Up a $47,000 Bill in 11 Days (And How to Stop It)

How an AI Agent Ran Up a $47,000 Bill in 11 Days (And How to Stop It) Published by Innovative Systems Global — April 2026 In November 2025, four AI agents entered an infinite retry loop. Nobody noticed for 11 days. When the bill arrived, it was $47,000. All of it from LLM API calls. All of it preventable. The team had logging. They had monitoring. They did not have a hard limit. This is not a unique incident. It's becoming a rite of passage for engineering teams running agents in production. Why