One workspace to read, ask, and learn from every source
Drop in your PDFs, links, videos, and notes. Chat with them and get answers cited back to what you added, then turn the same workspace into flashcards, a quiz, or a summary when it's time to study.
What did the paper conclude about long-context retrieval?
Retrieval-based methods held up better than full-context windowing past ~50 pages, since attention accuracy drops off the longer the context gets.
Everything you need to work with a source, in one place
Not just storage — a workspace that reads, answers, and studies alongside you.
Chat grounded in your sources
Ask questions and get answers pulled from what you actually added — cited back to the source, not the model's imagination — with web search when a question needs outside context.
Turn sources into study tools
Generate summaries, key takeaways, flashcards, quizzes, mind maps, and reports from a workspace in one click.
Remembers what matters
The assistant picks up facts about you from your chats and carries them into every notebook — and a dedicated page lets you review or remove anything it keeps.
Every source, viewed natively
Add PDFs, websites, YouTube videos, and notes — then read them in a real PDF viewer, play videos inline, and see markdown rendered.
Know what's ready
Track each source from upload to processed, see why one failed, and filter a notebook by type or status.
From raw source to study-ready, in three steps
Add your sources
Drop in PDFs, links, YouTube videos, or paste in notes. Each one processes into a workspace you control.
Ask, cited to the source
Chat with the workspace and get answers grounded in what you added, with web search available when you need more.
Generate study tools
Turn the same sources into a summary, flashcards, a quiz, a mind map, or a full report — ready when you are.
Your sources are waiting to be a workspace
Free to start. No credit card, just your first source.