title: README
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LLMs in simple, pure C/CUDA with no need for 245MB of PyTorch or 107MB of cPython. Current focus is on pretraining, in particular reproducing the GPT-2 and GPT-3 miniseries, along with a parallel PyTorch reference implementation in train_gpt2.py. You'll recognize this file as a slightly tweaked nanoGPT, an earlier project of mine. Currently, llm.c is a bit faster than PyTorch Nightly (by about 7%). In addition to the bleeding edge mainline code in train_gpt2.cu, we have a simple reference CPU fp32 implementation in ~1,000 lines of clean code in one file train_gpt2.c. I'd like this repo to only maintain C and CUDA code. Ports to other languages or repos are very welcome, but should be done in separate repos, and I am happy to link to them below in the "notable forks" section. Developer coordination happens in the Discussions and on Discord, either the #llmc channel on the Zero to Hero channel, or on #llmdotc on CUDA MODE Discord.