Microgpt: A ~200-Line Pure Python GPT by Andrej Karpathy

Microgpt is a ~200-line pure Python implementation of a GPT-style language model by Andrej Karpathy. It compresses the complexity of transformers into an executable, dependency-free script that helps engineers understand tokenization, attention, training loops, and inference while improving debugging, evaluation, and architecture decisions.

Microgpt: A ~200-Line Pure Python GPT by Andrej Karpathy

Microgpt: A ~200-Line Pure Python GPT by Andrej Karpathy

Microgpt is a compact, educational implementation of a GPT-style language model written in roughly 200 lines of pure Python with no external dependencies. It became a widely discussed project on Hacker News, resonating with engineers who wanted to move beyond treating large language models as opaque tools.