I Built an Open-Source Tool to Track AI Coding Costs Across Claude Code, Codex & Cursor

The Problem I was using Claude Code, Codex, and Cursor daily but had no idea how much I was spending on tokens. Bills kept surprising me. The Solution I built AIUsage — a local-first, open-source CLI that tracks everything. Key Features Token usage tracking with daily breakdowns Cost estimation with configurable pricing Model usage ranking Multi-device sync via GitHub or S3 Desktop widget How It Works bash npm install -g @juliantanx/aiusage aiusage parse aiusage serve Why Local-First? Your data never leaves your machine. No accounts, no API keys, no cloud servers. Try It [aiusage.jtanx.com](https://aiusage.jtanx.com)