Barret Zoph, the Thinking Machines co-founder who defected to OpenAI, is now at Google

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Barret Zoph, a key architect behind RLHF and ChatGPT's post-training, has joined Google after a high-profile exit from OpenAI and a brief stint at Thinking Machines. His move represents a massive talent win for DeepMind as the big labs fight for the few researchers capable of training frontier models.