MicroGPT: Finally, a GPT Model You Can Actually See Inside Your Browser
MicroGPT: Finally, a GPT Model You Can Actually See Inside Your Browser TL;DR MicroGPT is an educational GPT implementation that lets you visualize how transformer models work directly in your browser. Posted on Hacker News in mid-February 2026, it’s gained significant attention (145+ upvotes) from developers wanting to understand what’s actually happening under the hood of models like GPT-5, Claude 4.6, and Gemini 2.5. Unlike production-scale models with billions of parameters, MicroGPT is deliberately tiny—making every layer, attention head, and token prediction visible and interactive. It’s not meant to compete with frontier models, but rather to demystify them. ...