Ai Usage 100% is a Chrome extension designed to monitor and manage your AI usage across Claude, ChatGPT, and Codex. This free tool provides a detailed dashboard directly in your browser's toolbar, allowing users to track their message counts, session limits, and plan types for each AI service. With features such as live refresh every 10 seconds and smart reset alerts, users can easily stay informed about their usage in real-time.

The extension offers specific tracking for each AI model, including session usage for Claude and per-model message tracking for ChatGPT. It also includes a dedicated section for Codex, making it easy for developers to monitor their coding sessions. Privacy is prioritized with all data stored locally, ensuring no external requests or data storage occurs. This tool is ideal for power users and developers who frequently switch between these AI models.