How to Run the Fruit Fly Brain Simulation Yourself
TL;DR: The Fly Brain Story in 30 Seconds September 3, 2026: Google Research and HHMI Janelia published the complete nervous system map of an adult male fruit fly in Cell. 166,700 neurons, 125 million synapses, the largest brain map by neuron count so far. The map, a connectome, is a wiring diagram: which neuron connects to which. Nobody “uploaded” a brain. The netlist was extracted and released under CC-BY. Within a week developers put a simple neuron model on top of the wiring and fed game frames into the fly’s eye neurons: Doom (Sept 6), Minecraft and Mario 64 (Sept 7), Beat Saber (Sept 9, 22 million views), crypto trading (Sept 10). Videos below. DOOMFLY’s own validation report is blunt: the fly has not learned to survive. It failed all three gates, vision, conditioning and survival. What you see on screen is reflex from the wiring, not learning. You can run it yourself: browsing neuron by neuron in neuPrint needs zero install, a full-brain simulation with flypoke runs on a laptop from an 850 MB download, and DOOMFLY or StonkFly need 16 GB of RAM and Python 3.11. “A fly brain was uploaded to a computer” was everywhere this week. Half of that sentence is true. The true half: an animal’s entire nervous system has been mapped neuron by neuron, synapse by synapse, and the map sits on a server as a file anyone can download. The false half is the idea that the file is a fly. ...