Cassie

Highlight text on any page to get an explanation or answer.

Add one free key — either works on its own. Both together is best.

Groq API key — free (fastest answers)

Quick answers with high free limits. Stored only in this browser. Get a free key (no credit card) at console.groq.com/keys.

Google (Gemini) API key — free (works on its own too)

Answers questions and reads snips, PDFs and pictures. Stored only in this browser. Get one free with your Google account at aistudio.google.com/apikey.

Groq model

Use it on PDFs: Snip, Whole file, Board. Or highlight text, right-click → Explain with Cassie.

Ask about this page

Cassie reads the page you're viewing in this tab — no need to highlight.

Recent answers

Answers you get from highlighting will show up here.