
nanochat: Train and Serve a $100 Mini ChatGPT in 4 Hours
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Train and serve your own mini ChatGPT in ~4 hours for ~$100 with a single, minimal, end-to-end codebase—and scale it with a few simple tweaks.

Train and serve your own mini ChatGPT in ~4 hours for ~$100 with a single, minimal, end-to-end codebase—and scale it with a few simple tweaks.

A structured prompt rewrite turned vague policies into checklists, boosting GPT-5-mini’s telecom benchmark accuracy by 22% and unlocking previously unsolvable tasks.