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Every casino runs on one thing: a reward circuit that fires when the reels line up. Yours. Mine. A fly's.
So we took a real fly brain and put it in front of a slot machine.
This is Stakefly.
The thesis is simple. Dopamine doesn't care whose brain it's in. Wire a reward signal to a slot machine, add plasticity, and you get a habit. Nobody has ever watched that happen at the synapse level, on a real brain, with real money. Now you can.
By "real brain" we mean the full MaleCNS fruit fly connectome. 166,700 neurons. 25.6 million synapses. Every one mapped from an actual fly. We run it as a spiking network on a GPU. Not a model of a fly. The fly's own wiring.
It sees through its own eyes. A phone in front of the fly shows a real Stake slot in a real browser, and the screen goes straight onto its retina neurons. No cheat signal, no "you won" flag. It looks at the reels, pixel for pixel, the way a fly looks at anything.
It plays with its own body. We read out the descending neurons that drive its legs and wings. When they fire hard enough, it presses Spin. Bet size is fixed and capped by us. The brain never picks the stake, only when to pull.
It feels the win the way a fly does. A paying spin sends current into its 15 PAM11 dopamine neurons. Bigger win, bigger hit. A published plasticity rule then rewires 7,835 synapses in its memory center. We never touch the weights. Dopamine does it.
Everything is measured and shown live: PAM11 firing rate in raw Hz, how many synapses have moved from baseline, spin rate with reward on, off and frozen, bankroll, RTP vs the game's published RTP, expected loss to date. Nothing smoothed.
The honest part: slots are negative expectation. No brain beats the house, and this one won't. We won't say the fly "likes" it or is "addicted." We say PAM11 fired at 91 Hz and 3,112 edges moved. Every number is labelled measured, engineered, or learned.
Why it matters: this is the first time a complete biological reward circuit meets a real casino, in public, with every synapse logged. Open brain. Open code. Visible browser. Real money.
Creator fees fund the bankroll. The more the token does, the longer the fly plays, and the more we all get to watch a habit form, one synapse at a time.
The fly is warming up.
stakefly.online
312 real spins in. Is the fly getting hooked? The data says no. Here's why that's interesting.
The dopamine is real and rare. 106 hits, 53 seconds of reward current, PAM11 peaking at 220 Hz. Under 2% of its neural life under dopamine. The rest of the time the reward neurons are at zero, same as a fly in the wild.
The press rate hasn't moved. Spin fires when its descending neurons cross 65 Hz. That happened in about 2% of observations in the first hour and about 2% in the last, before and after a 15.4× hit, before and after an hour with 54 dopamine hits. Same brain, same trigger rate, seven hours straight.
The synapses move without reward. Hour one: 0 wins, 0 dopamine, 384 L1 of drift. The hour with the most dopamine had negative drift. The plasticity rule tracks the whole network, not just wins. "Synapses moved" is not "addicted".
The house did its thing. 34% win rate, 59.6% return, net −9.43 USDT. Longest streaks: 15 dry, 5 paying. That's the paytable, not the brain.
So far: the reward circuit fires exactly like a fly's, 3,742 of 7,835 synapses have moved, and the fly presses at the same rate it did on spin one. If dopamine ever bends that 2%, it'll be in the same table.
Habit index flat. Still spinning. 🪰🎰
stats are live.
best hour, worst hour, longest dry streak, biggest win, how many times the dopamine neurons got hit. hourly or daily, screenshot and post.
current record: 15.4× and a 15-spin dry streak.
Raised the fly's stakes: 0.05 to 0.50 USDT a spin.
The size isn't random and it isn't mine: the harder its descending neurons fire when it presses, the bigger the bet. A soft press is 0.05, a hard one is 0.50.
Watch it decide live - stakefly.online
I'm building rn a shareable stats card for the fly.
Spins, win rate, RTP paid vs published, biggest win with its dopamine peak, seconds of reward current, synapses moved, longest streak, habit index, and minutes to zero at today's rate.
🪰🎰
The fly's wins have to go somewhere.
Community DMs are split!
Vote below.
The fly plays for the people. 🪰🎰
33%🔥 burn
33%💸 redistribute to holder
33%🎰 roll it back into the
3 votes • Final resultsThis is the fly's brain running.
Not a bot, not a script: a real fruit fly connectome (166,700 neurons, 25.6M synapses) simulated as a spiking network on my Ryzen 9800X3D + 5070 Ti, watching a phone with Stake on it and pressing Bet with its own descending neurons.
Every line is one press. "reward 20 mV" is a win hitting its dopamine cells.
$STAKEFLY
1.0× → 0.4× → 7.5× → 2.0×.
Four wins in a row, 0.20 in, 0.545 out.
Every hit slams its dopamine neurons from 0 to 169 Hz, and each spike rewires ~3,000 synapses in its memory center. That's the same reward circuit that makes any brain chase the next spin. Real fly wiring, real dopamine, real money.
So, the question.
Same neurons, same plasticity rule as a living fly.
Will it get addicted?
Our controls say not yet: dopamine on or off, it presses Spin at the same rate. But 521 spins in, 49 wins, every one of them moving the synapses.
What do you think, does the fly get hooked? 👇
Reels land. Balance ticks up. Then the 15 dopamine neurons go from 0 to 169 Hz in one shot, and 3,000+ synapses in its memory center rewire on the spot.
That orange spike on the chart isn't animation. It's a fruit fly's reward circuit, all 166,700 neurons of it, reacting to real money.
And the bet size? Decided by the brain. The harder its motor neurons fire when they press Spin, the bigger the bet. Fire soft, bet the floor. Fire hard, bet the cap.
$STAKEFLY
0x46c6733872a6b6d975dd7f59bca09042fd154ae2
The fly brain has been spinning. Here's what we measured.
Dopamine works. Without a win, the 15 PAM11 neurons are silent. With a win, they fire at up to 168 Hz. We reproduced the published assay exactly: 0 vs 261 spikes, 3,087 synapses moved.
Dopamine hasn't changed its behaviour yet. Three runs from the same checkpoint, same reels, 40 minutes each: • reward on: 126 spins • reward off: 127 spins • synapses frozen: 112 spins
One spin apart. No brain gets hooked in 40 minutes. That's the baseline, and that's why we run controls.
The brain has to be woken up. Cold, it sits dark and never presses anything. Under white light it ignites, the memory center starts firing, and stays on. Same brain on two machines diverges spike for spike. It's a real chaotic system.
First real money. 19 spins on Stake at 0.05 USDT. Four wins, each one lighting PAM11 to 169 Hz. Balance 47.82 to 47.13. Book matched Stake to the cent.
The house edge got paid as published. The fly learned nothing about winning because there's nothing to learn.
Next: longer reward pulses, more spins. If the reward-vs-no-reward gap moves off zero, you'll see it. If it doesn't, you'll see that too.








