Cost per accepted change

Calculator

Compute cost per accepted change

Enter the costs and counts for one measurement window — a sprint, a month, a quarter. The calculator runs entirely in your browser; nothing is sent to a server.

LLM / API spend attributable to the changes produced.
Compute, storage, observability, tooling overhead.
Spec / prompt / integrate / steer, converted to currency.
Time spent reviewing / gating AI work, converted to currency.
Cost of fixing or reverting changes that did not stay in production.
Reached production and stayed there during the window.
Cost per accepted change —
View source

Use the library

The calculator is a pure TypeScript function. Import it in your own dashboards, FinOps pipelines, or CI jobs: 

import { costPerAcceptedChange } from 'cost-per-accepted-change';

const cpac = costPerAcceptedChange({
  modelCost: 1200,
  infraCost: 400,
  engineeringTime: 18000,
  reviewCost: 6000,
  reworkCost: 2400,
  acceptedChanges: 42,
});

console.log(cpac.value);     // 666.67
console.log(cpac.breakdown); // share-of-total per component

Source: github.com/brennhill/cost-per-accepted-change. MIT-licensed.