Earlier quoted context omitted.
Still more open than Google, Microsoft or DeepMind
In what specific ways? Google and Microsoft both release and contribute to open source software. They both publish vast amounts of research. What does OpenAI do differentially?
It took a long time until their source code became public, and replication of certain papers is problematic to say the least.
Similar issues exist with some G.Brain papers not releasing code publicly years after acceptance.
But all of these are anecdata from a random person on HN so take with a grain of salt.