OpenAI owns ChatGPT, with the OpenAI Foundation overseeing its governance to...

https://domgodwinson38.gumroad.com/p/what-changed-in-the-microsoft-openai-deal-in-october-2025

OpenAI owns ChatGPT, with the OpenAI Foundation overseeing its governance to guide ethical and strategic decisions. Microsoft is a significant investor providing funding and infrastructure but does not own or control the chatbot