As of Aug 4, 2026, ChatGPT is developed and owned by OpenAI LP, a company...

https://stateofseo.com/does-microsoft-own-chatgpt-or-just-invest-in-openai/

As of Aug 4, 2026, ChatGPT is developed and owned by OpenAI LP, a company governed by a board with investors and original founders. The latest funding round valued OpenAI LP at $852 billion post-money, with $122 billion in committed capital