The research is open to the public. Here's the gpt3 paper https://arxiv.org/abs/2005.14165

Also gpt2 models and code at least were publicly released and so has a lot of their work.

And yes, they realized they can achieve more by turning for profit and partnering with Microsoft. So true, they are not fully 'open' but pretending they don't release things to the public and making the constant 'more like closedai aimirite' comments is getting old.