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nanoGPT is an open-source project that provides a simple and fast repository for training and fine-tuning medium-sized GPT models. It is a rewrite of minGPT focused on speed and practicality, capable of reproducing GPT-2 (124M) on OpenWebText. The project is now considered old and deprecated in favor of its successor nanochat, though the repository remains available for posterity.
AI named nanoGPT from December 2025 to January 2026.