Model Usage: Claude & Codex Limits

Track Claude and ChatGPT (Codex) session & weekly usage limits at a glance in a popup and on-page overlay. Privacy-first, no setup.

Model Usage: Claude & Codex Limits is a browser extension for people who want a clearer, more predictable AI assistant experience. Track your message limits, view real-time countdowns, and display unobtrusive usage meters directly on provider pages so you can focus on your work without hitting sudden limits. Whether you use Claude and ChatGPT for coding, writing, research, or deep problem-solving, Model Usage helps reduce the friction of hitting limit blocks and gives you direct control over how your capacity is monitored. You choose where the overlay appears and how you track your limits. Key features: - Real-time limit tracking for Claude (claude.ai) and ChatGPT/Codex (chatgpt.com) - At-a-glance toolbar badge showing your highest current usage percentage - Contextual on-page overlays positioned right next to chat inputs - Collapsible capsule widget in Shadow DOM to prevent host page style clashes - Session-based (5-hour) and weekly (7-day) capacity monitoring - Live countdowns showing precisely when your limits will reset - On-demand refresh button and automatic background syncing every 5 minutes - 100% private: reads directly from your own authenticated browser sessions Why users choose Model Usage: - Fast, automated usage polling without manual page reloading - Cleaner UI that integrates seamlessly with AI chat interfaces - Better pacing for heavy coding, learning, or writing sessions - Safe by design with no external servers, no tracking, and no telemetry - Simple side-panel controls with quick enable/disable options Great for: - Developers and power users who use Claude Code or ChatGPT limits heavily - Plus, Pro, and Team plan subscribers who want a clear read on their quotas - Professionals and students who want to avoid interrupting their deep work flow - Anyone tired of hitting "you've reached your limit" with no prior warning Model Usage is an independent project. It is not affiliated with, endorsed by, or sponsored by Anthropic or OpenAI. Claude is a trademark of Anthropic, PBC. ChatGPT and Codex are trademarks of OpenAI, Inc.