We did what most engineering teams do.

Bought an OpenAI API key. Shared it on Slack. Told everyone to start using AI in their workflow.

It felt like the right move. Productivity went up. Developers were happy. Managers were impressed.

Then the invoice arrived.

Nobody could explain it. We could not tell which team spent what, which model was being used, or whether anyone had accidentally sent customer data to an external provider. We had full AI adoption and zero visibility.