01Live
The 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.
- Neurons
- 163,997
- Connections
- 6,236,426
- Download
- 25 MB
- Servers
- 0
The published data is 13 GB. Compiled for the browser it is 25 MB, about one short video.
Experiments
Each one is a claim about what the wiring can do, and a test of it.
02Planned
Mahjong
Teach the fly a game and let it play real people.
Read the plan →
03Planned
The Compass
Watch 46 neurons hold a heading in the dark.
Read the plan →
04Planned
The Smell
Fifty-three kinds of smell receptor, one meal to find.
Read the plan →
05Planned
Lesions
Switch off any cell type. See what breaks.
Read the plan →
06Planned
The Retina
Point the fly's motion detector at your webcam.
Read the plan →
07In progress
The Atlas
Every neuron, and the shortest path between any two.
Read the plan →