Notes

Pages we wish teams had before the first large bill

These notes come out of sittings: how to split a GPU-hour line, why token counters lie, what a campaign leaves running, and the four questions finance will ask after go-live.

Handwritten notes beside a laptop during a working session

2 April 2026

Token counts and the bill are not the same story

A product team can watch tokens rise slowly while the invoice jumps. The gap is usually context length, retries, or a second model that never appeared on the dashboard the team actually looks at.