AI Usage Monitor – Claude Code & Codex

Claude Code and Codex quotas, side by side, in one click. AI Usage Monitor shows how much of your AI coding quota you have left, so a limit never takes you by surprise in the middle of a task. WHAT YOU SEE • Claude Code: the 5-hour session and the weekly limit, in one card • Codex: your ChatGPT plan's Codex limit (every window your plan has) • A countdown to each reset • Extra bars when your plan has them: Sonnet and Opus weekly limits, Codex code review • The plan name and the Codex credits ALWAYS IN VIEW • A colour badge on the toolbar icon: the highest of the two, or Claude only, or Codex only • Alerts at 70%, 80%, 90% and 95%, separately for each tool • Refreshed every minute in the background NO SETUP IN MOST CASES • Already logged in to claude.ai and chatgpt.com in Chrome? It just works. • Advanced: paste your Claude Code .credentials.json or Codex auth.json instead. PRIVATE BY DESIGN • Talks only to claude.ai, api.anthropic.com and chatgpt.com, to read your own usage • No server of ours, no analytics, nothing sold or shared • Tokens stay in Chrome's local storage on your computer Interface in English, French, Spanish, Chinese and Hebrew. New in 5.0: Codex support, a new design with tabs (Gauges / Settings & info), language and badge settings, per-tool alerts. Not affiliated with Anthropic or OpenAI. Claude is a trademark of Anthropic; Codex and ChatGPT are trademarks of OpenAI.