Everything a curious reader needs — without leaving the page.
Drill turns the text you are reading into a surface you can question. Highlight a line, get an answer in place, drill until it clicks, and come back to every thread you leave behind.
- 01Inline answers
- 02Recursive drill
- 03Knowledge map
- 04Review & recall
The Drill thesis
“Reading should answer its own questions. A page that cannot explain itself is a page you keep abandoning.”
— Why we built Drill
Reading paths
Start with the page that matches what you read.
These focused pages connect the feature overview to common reading workflows.
Inline answers
The explanation lives inside the paragraph, not in another tab.
Highlight the line that stopped you. An AI answer threads in right below it, so your eyes never have to travel.
- 01Answers anchor to the exact sentence you selected.
- 02Code blocks, tables, and the rhythm of the page stay intact.
- 03Close the answer and the page reads as if nothing happened.
In the product
The explanation lives inside the paragraph, not in another tab.
Recursive drill
When one answer raises ten questions, drill each one.
Every explanation is itself drillable. Follow the thread down until the idea lands — no new search, no new prompt.
- 01Each drill carries its parent's context instead of resetting it.
- 02No artificial depth cap — you stop when you understand.
- 03The thread stays on-topic because the context does.
Origin
Original passage
Transformers use self-attention to process every token in a sequence in parallel.
Drill · 01
Self-attention
A mechanism where each token decides how much weight to give every other token in the same sequence.
Drill · 02
Weight
A number in [0,1] from a softmax over query·key similarity — drilling deeperstreaming
Knowledge map
Follow long branches and still see where you are.
A live map of your reading thread. Move back to the paragraph you started with, dive into a child branch, or jump to any branch you left behind.
- 01The current layer is always visible in its context.
- 02Zoom out is one press — never a back-button chain.
- 03Side branches stay on the map for when you circle back.
Your reading thread
Review & recall
Turn a reading session into something you will actually remember.
Promote any drill into a flashcard or quiz, keep every session saved, and let spaced review bring the hard bits back to you.
- 01One click turns a drilled passage into a flashcard or quiz.
- 02Every session is saved — revisit any thread from any day.
- 03Continue yesterday's reading exactly where you left off.
Which step happens right before the softmax in attention?
Saved sessions
3- TodayTransformers
- 3 days agoRust ownership
- Last weekKafka partitions
Start Reading
Ready to read inside the explanation?
Start with a paragraph, highlight what blocks you, and keep drilling without leaving the page.