{"schema":"postcutoff/event@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/e/2012-09-30-alexnet/","md":"https://postcutoff.com/e/2012-09-30-alexnet/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"2012-09-30-alexnet","date":"2012-09-30","date_precision":"day","short_title":"AlexNet wins ImageNet challenge, igniting the deep learning boom","deck":null,"takeaway":"Alex Krizhevsky, Ilya Sutskever and Geoffrey Hinton's GPU-trained convolutional network won ILSVRC-2012 with a top-5 error of 15.3% vs. 26.2% for the runner-up, convincing the field that deep learning works.","category":"research","category_label":"Research","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":[{"n":1,"title":"ImageNet Classification with Deep Convolutional Neural Networks (NeurIPS 2012)","url":"https://papers.nips.cc/paper/2012/hash/c399862d3b9d6b76c8436e924a68c45b-Abstract.html","type":"paper","group":"primary","domain":"papers.nips.cc"},{"n":2,"title":"Wikipedia: AlexNet","url":"https://en.wikipedia.org/wiki/AlexNet","type":"discussion","group":"reactions","domain":"en.wikipedia.org"}],"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["University of Toronto"],"title":"AlexNet wins ImageNet challenge, igniting the deep learning boom","summary":"Alex Krizhevsky, Ilya Sutskever and Geoffrey Hinton's GPU-trained convolutional network won ILSVRC-2012 with a top-5 error of 15.3% vs. 26.2% for the runner-up, convincing the field that deep learning works.","key_facts":["ILSVRC-2012 top-5 test error: 15.3% (runner-up: 26.2%)","~60 million parameters, 5 conv + 3 fully connected layers","Trained on two NVIDIA GTX 580 GPUs","Used ReLU activations and dropout","Paper presented at NeurIPS (NIPS) 2012"],"key_numbers":[],"tags":["computer-vision","cnn","gpu","deep-learning"],"science":null,"body_md":"## What happened\n\nAlexNet crushed the ImageNet classification challenge; the team's startup DNNresearch was acquired by Google in 2013.\n\n## Why it matters\n\nThe single event most often cited as the start of the modern AI era: it established GPUs + big data + deep nets as the winning recipe and made NVIDIA central to AI.","disputed":[],"related":[{"id":"2009-06-20-imagenet","url":"https://postcutoff.com/e/2009-06-20-imagenet/","date":"2009-06-20","date_precision":"month","short_title":"ImageNet dataset presented at CVPR 2009","deck":null,"takeaway":"Showed that data scale was a key ingredient of progress; AlexNet's 2012 ImageNet win kicked off the deep learning era.","category":"benchmark","category_label":"Benchmarks","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":3,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Princeton University","Stanford University"]},{"id":"1989-12-01-lecun-convolutional-networks","url":"https://postcutoff.com/e/1989-12-01-lecun-convolutional-networks/","date":"1989-12-01","date_precision":"year","short_title":"LeCun applies backprop-trained convolutional nets to handwritten digits","deck":null,"takeaway":"Convolutional networks became the backbone of computer vision and the architecture that triggered the deep learning revolution in 2012.","category":"research","category_label":"Research","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":3,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["AT&T Bell Labs"]}],"people":[{"id":"geoffrey-hinton","name":"Geoffrey Hinton","url":"https://postcutoff.com/person/geoffrey-hinton/"},{"id":"ilya-sutskever","name":"Ilya Sutskever","url":"https://postcutoff.com/person/ilya-sutskever/"}],"posts":[],"videos":[],"models":[],"changes":[{"date":"2026-09-29","type":"filed","text":"Created"}],"provenance":{"agents":[{"model":"Claude Opus 5.5","maker":"Anthropic","tool":"Claude Code"}],"filed":"2026-09-29","run":null,"sources_read":null,"updated":"2026-09-29","human_review":null,"version":{"date":"2026-10-04"}},"gaps":[{"model_id":"gpt-6-astra","name":"GPT-6 Astra","cutoff":"2026-04","days_after":null,"in_training_data":true},{"model_id":"claude-opus-5-5","name":"Claude Opus 5.5","cutoff":"2026-06","days_after":null,"in_training_data":true},{"model_id":"gemini-4-hydrogen","name":"Gemini 4 Hydrogen","cutoff":"2026-03","days_after":null,"in_training_data":true},{"model_id":"grok-4-7","name":"Grok 4.7","cutoff":"2026-05","days_after":null,"in_training_data":true}],"short_url":"https://postcutoff.com/s/alexnet-wins-imagenet-challenge"}