Free really is free
BYOK across every provider, single-turn chat in any tab, selection popover, page summarize. No trial-then-paywall.
For students
Sephir for students.
Free tier covers the chat surface forever. BYOK with a Gemini free key for unlimited study sessions. No auto-renew, no card on file.
What you actually use
Four features you’ll touch every day.
Gemini free tier works
Paste a free Google AI Studio key — pay nothing, study unlimited. Switch providers any time.
ChatGPT Plus, if you have it
Already paying for ChatGPT Plus? Sign in with OAuth, get Codex routing for free — no second subscription.
Saved conversations
Your study sessions stay in your browser, organised by course. Export to Markdown for your notes app whenever.
A typical day
Five steps, one prompt.
- 01Install Sephir for Chrome — no account required.
- 02Add your free Gemini API key (or sign in with ChatGPT Plus if you have it).
- 03Open the Sephir popover on whatever you're studying — a Wikipedia article, a textbook PDF, a YouTube lecture.
- 04Ask questions in plain language. The agent reads the open tab and answers.
- 05Save the chat to a course folder, export to Markdown when you need notes.
Recommended setup
Google Gemini (free tier) — the best free option for students. Upgrade to Claude Haiku via OpenRouter when you need more headroom.
Try the agent layer free.
BYOK from day one, ChatGPT Plus OAuth in one click, no credit card required for the 7-day trial of Pro.