I Spent $847 Running AI Agents for a Month. Here's the Spreadsheet.

Last month I went all-in on AI agents. Not just copilot-style autocomplete — full autonomous agents that browse the web, write code, manage deployments, and chain together multi-step workflows.The bill was $847. Here's what I learned about where the money actually goes.## The SetupI had three main agent workflows:1. Code review agent — reviews PRs, leaves comments, suggests fixes2. Content pipeline agent — scans trends, writes drafts, schedules posts 3. Monitoring agent — watches dashboards, sends alerts, auto-remediates simple issuesEach one runs on a different model. Each one has different token economics. And that's where things get interesting.## Where the Money GoesHere's the breakdown that surprised me:| Agent | Monthly Cost | Tokens Used | Cost/Task ||-------|-------------|-------------|-----------|| Code Review | $312 | ~18M tokens | $2.60/PR || Content Pipeline | $389 | ~24M tokens | $4.85/article || Monitoring | $146 | ~8M tokens | $0.12/check | The content pipeline was the m