01LiveThe Room
Put the brain in a room and see if it acts like a fly.
Open →
Fruit fly · complete nervous system · Janelia and Google, 2026
A real fly brain,
running in your browser.
In 2026, Janelia and Google released the complete wiring of a fruit fly brain. Every neuron, every connection, free to anyone. GFly loads it into a browser tab and runs it live. No server. No account.
- 164,740
- Neurons
- 25,568,639
- Connections
- 9–80 MB
- Download
- 0
- Servers
The published data is 13 GB. Compiled for the browser it is 9, 20 or 75 MB depending on how much of the wiring you ask for; pick that from the Brain menu above.
Experiments
Each one is a claim about what the wiring can do, and a test of it.
01Live
02In progressMahjong
Sit down at a table with three flies and play.
Read the plan →
03LiveChess
Play chess against a fly.
Open →
04LiveChinese chess
Xiangqi on the tea table, red against a fly.
Open →
05LiveSudoku
Fill a grid with three flies helping, or hindering.
Open →
06LiveTexas hold'em
A saloon, three flies in cowboy hats, and a pot.
Open →
07PlannedWatch 46 neurons hold a heading in the dark.
The Compass
Watch 46 neurons hold a heading in the dark.
Read the plan →
08PlannedFifty-three kinds of smell receptor, one meal to find.
The Smell
Fifty-three kinds of smell receptor, one meal to find.
Read the plan →
09PlannedSwitch off any cell type. See what breaks.
Lesions
Switch off any cell type. See what breaks.
Read the plan →
10PlannedPoint the fly's motion detector at your webcam.
The Retina
Point the fly's motion detector at your webcam.
Read the plan →
11In progressEvery neuron, and the shortest path between any two.
The Atlas
Every neuron, and the shortest path between any two.
Read the plan →