None of these companies are really directly concerned about profitability. Right now the leaders in ML models are going to be defined by those who have the most

None of these companies are really directly concerned about profitability. Right now the leaders in ML models are going to be defined by those who have the most capital available to train newer and better models. And the quickest way to get that capital is largely getting investors on board. From that perspective it’s quite rational to release something publicly in a way that is likely to raise the profile of your company. Especially in a world where your main competitors will be training their own models anyways.