Perceptron Mark I

Closed weights Cornell Aeronautical Laboratory,Cornell University 1K parameters January 1957

No estimate

No hardware requirements for this model

The weights for this model have not been published, so it cannot be downloaded or run on your own hardware at any size. It is reachable only through its provider, and no graphics card changes that.

On record

Full specification

Everything on record for this model. Most of it describes how it was trained rather than how it runs — useful context for judging how much work went into it, and how it compares with models built at a different scale.

Origin

Who built this model, where, and when it was published.

Organisation
Cornell Aeronautical Laboratory,Cornell University
Organisation type
Academia,Academia
Country
United States of America
Published
1 January 1957
Authors
F Rosenblatt

What it does

The problem areas the model was built for. A model can carry several of each.

Domain
Other
Task
Binary classification

Size

How large the model is and how much data it was trained on. Parameters are the figure that decides whether it fits on a given graphics card.

Parameters
1K

"Figure 4.8 Illustration of the Mark 1 perceptron hardware. The photograph on the left shows how the inputs were obtained using a simple camera system in which an input scene, in this case a printed character, was illuminated by powerful lights, and an image focussed onto a 20 × 20 array of cadmium sulphide photocells, giving a primitive 400 pixel image. The perceptron also had a patch board, shown in the middle photograph, which allowed different configurations of input features to be tried. Of…

Training data
100 tokens

Appendix II describes an experiment with 6 stimulus patterns https://babel.hathitrust.org/cgi/pt?id=coo.31924004657973&seq=47 describes simulation experiments with "X" and "E" patterns using 100 total training stimuli

Training compute

The arithmetic performed to train the model, measured in floating-point operations. It is a measure of what the training run cost, not of how fast the finished model answers you.

Training compute
6.9 × 10⁵ FLOP

Extracted from AI and Compute (https://openai.com/blog/ai-and-compute/) charts by using https://automeris.io/WebPlotDigitizer/. Additional experiment described in https://babel.hathitrust.org/cgi/pt?id=coo.31924004657973&seq=70 - 400 input (20x20) - 512 hidden with 40 fixed connections each (not learned) - 1 output (learned) Parameters: 512*1=512 Forward flop: 41*512=20992 Forward + “backward flop”: 43*512=22016 (only last layer was adjusted) 100*22016=2201600

How it was established
Third-party estimation

How it is classified

Labels the source dataset applies when tracking notable models, and how confident it is in the entry.

Frontier model
Yes
Why it is tracked
Historical significance,Highly cited

First modern neural network

Record confidence
Likely
Citations
1,610

Sources

Where this record came from and when it was last checked.

Reference
The Perceptron—a perceiving and recognizing automaton
Last updated
28 November 2025

What the numbers mean

Where it came from

Perceptron Mark I was published by Cornell Aeronautical Laboratory,Cornell University, in the country recorded as United States of America, during January 1957. The publishing organisation is categorised as academia,Academia.

It works in the domain of Other, and is recorded as performing the task of binary classification.

Because the weights are not available, none of the hardware figures elsewhere on this site apply to it.

How it was trained

The training run consumed about 6.9 × 10⁵ FLOP. That figure measures what producing the model cost, and has no bearing on how fast it answers.

It was trained on a corpus of about 100 tokens of text.

The reason it appears in this catalogue at all: historical significance,Highly cited.

Answers

Perceptron Mark I — common questions

01

Perceptron Mark I— how much compute was used to train it?

Training consumed around 6.9 × 10⁵ FLOP. That measures what producing the model cost and says nothing about how quickly it answers once trained — inference speed comes from memory bandwidth, not from the training budget.

02

Perceptron Mark I— what GPU do I need to run it?

None. This is a closed model — its weights were never published, so it cannot be downloaded or run on your own hardware at any price. It is reachable only through its provider.

03

Perceptron Mark I— is it open source?

The licensing was never recorded in our source data. We treat unstated licensing as closed, because an unrecorded licence is not one to rely on.

04

Perceptron Mark I— how many parameters does it have?

It has a parameter count of 1K. "Figure 4.8 Illustration of the Mark 1 perceptron hardware. The photograph on the left shows how the inputs were obtained using a simple camera system in which an input scene, in this case a printed character, was illuminated by powerful lights, and an image focussed onto a 20 × 20 array of cadmium sulphide photocells, giving a primitive 400 pixel image. The perceptron also had a patch board, shown in the middle photograph, which allowed different configurations of input features to be tried. Often these were wired up at random to demonstrate the ability of the perceptron to learn without the need for precise wiring, in contrast to a modern digital computer. The photograph on the right shows one of the racks of adaptive weights. Each weight was implemented using a rotary variable resistor, also called a potentiometer, driven by an electric motor thereby allowing the value of the weight to be adjusted automatically by the learning algorithm." source: Bishop, Christopher M. (2006). Pattern Recognition and Machine Learning The Perceptron had a 400-pixel visual input and 1000 neurons in the hidden layer. https://twitter.com/DiegoKuonen/status/1130352233223262208. That figure is the total, and it is what decides how much memory the model needs — roughly half a gigabyte per billion at the compression most people use.

05

Perceptron Mark I— who created it?

It was published by Cornell Aeronautical Laboratory,Cornell University, based in United States of America, an organisation categorised as academia,Academia.

06

Perceptron Mark I— when was it released?

It was published in January 1957. Capability per parameter has improved considerably since, so a newer model of the same size is often the better use of the same hardware.

07

Perceptron Mark I— what is it used for?

It works in the domain of Other, and is recorded as handling the task of binary classification. These are the areas it was designed around; they describe intent rather than a hard boundary.

Source

Original publication

Record last updated 28 November 2025

The other direction

Looking at it from the other side?

This page starts from the model. If you already own a card and want to know everything it will run, start from the hardware instead.