A step-by-step guide to setup a runnable GPT-2 model on your PC or laptop, leverage GPU CUDA, and output the probability of words generated by GPT-2, all in Python — The best way to understand ChatGPT and GPT-3 is to install one on a personal computer, read the code, tune it, change parameters, and see what happened after every change. Considering the size of the GPT3 model, not only that you can’t download the pre-trained model data, you can’t even…