Nope, he is not a core contributor of GPT-4, GPT-3, GPT-2, DALLE-3, DALLE-2: https://arxiv.org/abs/2303.08774 https://cdn.openai.com/papers/dall-e-2.pdf https://arxiv.org/pdf/2005.14165.pdf https://arxiv.org/abs/1908.09203