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a machine learning platform you play

NEURAL//RUN

Ten modules from vectors to attention. Four missions each. A skill tree in three dimensions. The maths runs in your browser, in C++, and you can read every line of it.

jack intry gradient descent
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The tree

10 modules, 4 bosses
Vectors and Tensors, FoundationsGradient Descent, locked, FoundationsLinear Regression, locked, Classical MLLogistic Regression, locked, Classical MLK-Means, locked, Classical MLDecision Trees, locked, Classical MLMulti-Layer Perceptron, locked, Deep LearningBackpropagation, locked, Deep LearningConvolutional Networks, locked, Deep LearningEmbeddings and Attention, locked, Generative and NLPThe Bowl, locked, FoundationsThe Inbox, locked, Classical MLThe Spiral, locked, Deep LearningBreach Protocol, locked, Generative and NLP
open in 3-D

Daily glitch

2026-09-16

Decision Trees

The loss readout is dark. Trust the gradient.

+75 bonus xprun it

Hub

creator

how it works

Run it

01

Every module has a live demo on an engine written in C++ and compiled to WebAssembly. Sliders, draggable points, a loss curve that moves when you do.

Prove it

02

Predict what happens before you run it. Tune to a target. Fix a model that is broken on purpose. Write the function and pass the hidden tests.

Climb it

03

XP for understanding, never for clicking. Tiers per module, a boss at the end of every branch, a streak that forgives a missed day if you earned the token.