OpenAI owns ChatGPT and leads its development. The OpenAI Foundation handles...

https://andysexpertblog.nexorafield.com/posts/is-openai-controlled-by-one-investor-after-the-85.2b-valuation-round

OpenAI owns ChatGPT and leads its development. The OpenAI Foundation handles governance to guide its mission and policies. Microsoft is a significant investor supporting OpenAI’s growth but does not own ChatGPT or control its operations