As Treasure Data expanded its use of AI tools across engineering, support, and research, the monthly invoice from each AI vendor arrived as a single total.
It said what was owed. It said nothing about who had used the tokens, which projects they were tied to, which models had been called, or how many sessions that total actually represented, and the volume involved made checking it by hand out of the question.
Finance paid the number as given, because there was nothing to check it against. IT kept its own separate view of usage, built from whatever logs it could pull together, and that view rarely matched finance's.
When leadership asked what the company's AI spend was actually producing, the CIO had one figure and no way to break it down, by team, by project, by model, or by anything else that would explain where the money had gone.