I'm not sure what "open source" even means in the context of trained ML model. No one's going to be downloading this to their Macbook even if OpenAI would let you.
As for "non-OpenAI version", I'm not sure that it's OpenAI's fault that Google has missed a few steps here. It really SHOULD be them leading this field, if they weren't so fat and lazy. OpenAI is a 7-year old startup with just over a few hundred employees. This stuff is RIGHT THERE to be claimed by any players with access to funding and an ability to get out of their own way.
As for "non-OpenAI version", I'm not sure that it's OpenAI's fault that Google has missed a few steps here. It really SHOULD be them leading this field, if they weren't so fat and lazy. OpenAI is a 7-year old startup with just over a few hundred employees. This stuff is RIGHT THERE to be claimed by any players with access to funding and an ability to get out of their own way.