Marin: Open Development of Frontier AI

As AI capabilities skyrocket, openness plummets: the scientific community and broader public knows little of how frontier models (including open-weight models) are trained.  I will describe Marin, a radically new way of doing model development, inspired by true open-source software. Every experiment is done in the open, and anyone can suggest ideas, review, and even run experiments through GitHub, providing a better way of doing science that improves on preregistration, reproducibility, and peer review. I will discuss a selection of scientific results that have emerged from Marin, including new optimizers and scaling laws. We hope that Marin will be a platform for the community to participate in the development of frontier AI.