## Build and Train a 25M Parameter LLM From Scratch on Your CPU You don't need a massive GPU cluster to learn how modern frontier AI works. In our new video on the freeCodeCamp.org YouTube channel, you will build, pre-train, and fine-tune a working 25-million parameter language model directly on your laptop or standard CPU. Frontier labs train massive systems with billions of parameters, but the core architecture, math, and workflows are fundamentally identical. Scaling the architecture down to 25 million parameters with a compact byte-level vocabulary strips away expensive cloud compute…