There's hilariously nothing open about OpenAI, and that was the plan from the start. From the email by Ilya Sutsekver, OpenAI was always going to keep all it's research and code as proprietary information. Open supposedly meant the benefits would be shared. So they basically just became a SaaS with a free tier, like most of them. Musk was right when he called them out for fishing for money as if they were a non profit, but always had plans to become a company