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Frequently asked questions
Who owns ChatGPT?
ChatGPT is developed and operated by OpenAI, an AI research company founded in 2015 and led by CEO Sam Altman.
What model powers ChatGPT today?
ChatGPT routes queries across a family of models. The current default free tier uses GPT-4o with routing to smaller variants; paid tiers offer access to newer reasoning models such as o3 and GPT-5.