Tools & Resources Archive Details

Reproducing GPT-2 (124M) in llm.c in 90 minutes for $20 – karpathy/llm.c – Discussion #481 – GitHub

What it is

Learn how to quickly and affordably reproduce the GPT-2 (124M) in llm.c using only 90 minutes and $20.

Gabriel’s notes

How to reproduce the GPT-2 (124M) in llm.c (~4,000 lines of C/CUDA) in 90 minutes for $20.

Good fit if you want to:

  • build, test, or ship software faster (APIs, dev tooling, code assistance).
  • learn a new skill, concept, or workflow with structured guidance.

Pricing snapshot (auto-enriched): No free tier mentioned; usage-based pricing based on GPU hourly rental (e.g., $14/hr for an 8X A100 node); total cost to reproduce GPT-2 (124M) model is about $20 for 90 minutes of training; no hidden limits specified.

Work-use / compliance snapshot (auto-enriched): The llm.c tool is an open-source project without specific workplace use policies, data handling guidelines, SSO availability, or compliance certifications such as SOC2, HIPAA, or GDPR, making it generally unsuitable for regulated workplace environments requiring formal compliance.

Alternatives (auto-enriched): Alternative: Hugging Face Transformers | Comparison: Hugging Face Transformers offers a wide range of pre-trained models and easy-to-use APIs, while llm.c focuses on efficient, low-cost training and reproduction of GPT-2 on GPU hardware.

Before you adopt it: check the README, license, recent commits, and open issues to gauge maintenance and fit.

Author: karpathy

Note: pricing and policy details can change—verify on the official site before making decisions.

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