How LLM API Pricing Works

Tokens, input vs output, context windows — why the same task can cost 50× more on one model than another, explained simply.

Home › Chrome extension

AI Usage Tracker Chrome Extension — Count Your AI Chat Usage

Always know how close you are to a rate limit before it interrupts you. AI Usage Tracker quietly counts the messages you send on the major AI chat assistants and shows a running tally in your toolbar.

Add to Chrome →

Works on the major AI chats
Counts your messages on Claude, ChatGPT, Gemini and about a dozen other assistants.
Local, private counting
All counting happens in your browser — no account, nothing sent to a server, no page content stored.
Rate-limit awareness
See your running tally so you can pace usage and avoid hitting a limit mid-task.
Zero setup
Install, pin, and it just works in the background.

Frequently asked questions

Is AI Usage Tracker free?

Yes, free with no sign-up.

Is my data private?

Yes. Counting is entirely local; the extension makes no network requests and reads only message-send events.

How do I install it?

Click "Add to Chrome" above and pin the icon. It starts counting automatically on supported AI sites.

Prefer the web version?

Everything the extension does is also on the site:

Compare 387 model prices →Per-model pricing →Learn about API costs →

Add to Chrome →