Simon Willison’s Weblog

nanoGPT. “The simplest, fastest repository for training/finetuning medium-sized GPTs”—by Andrej Karpathy, in about 600 lines of Python.

Posted 2nd January 2023 at 11:27 pm

Recent articles

OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025
Useful patterns for building HTML tools - 10th December 2025

python 1212 ai 1731 gpt-3 67 andrej-karpathy 34 generative-ai 1529 llms 1495

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