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> It was from GPT-2

Prior to the released of GPT-5, Sam said he was scared of it and compared it to the Manhattan Project.

Not just Altman. Buffett said it also, more generally.

Not just part of the developers, but rather "led the development of large language models like GPT-2 and GPT-3" as per his website.

This is pretty much correct, but Mustafa Suleyman has probably been doing it longer.