Google Gemini Co-Lead Noam Shazeer Joins OpenAI Less Than Two Years After $2.7 Billion Return

Reviewed byNidhi Govil

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Noam Shazeer, vice president of engineering at Google and co-lead of its Gemini AI models, announced he is leaving to join OpenAI. The move comes less than two years after Google reportedly paid $2.7 billion to bring him back from Character.AI. As co-author of the 2017 transformer paper that underpins modern AI, his departure marks a significant shift in the AI talent war between tech giants.

Google Gemini Co-Lead Noam Shazeer Departs for OpenAI

Noam Shazeer, vice president of engineering at Google and co-lead of its Gemini AI models, announced Wednesday that he is leaving the company to join OpenAI

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. The top AI researcher shared the news on X, stating he was excited to work with the team at OpenAI while acknowledging the difficulty of his decision

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. His departure comes less than two years after Google brought him back through a licensing deal with Character.AI, the startup he co-founded after initially leaving Google in 2021

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Source: Benzinga

Source: Benzinga

The move represents a striking development in the AI talent war, particularly given the speed of Shazeer's exit. Google reportedly paid around $2.7 billion in 2024 to bring him back, along with a team of researchers from Character.AI

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. To lose him again so quickly to the company Google most directly competes with raises questions about whether enormous retention packages actually work in the AI industry

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The Transformer Pioneer's Impact on AI Development

Shazeer's significance extends far beyond his role at Google. He co-authored the landmark 2017 paper "Attention Is All You Need," which introduced the transformer architecture that underpins virtually every modern large language model, including ChatGPT, Claude, and Gemini

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. As one of a small group of researchers whose work sits underneath what the AI industry now calls AI, his decision to switch sides carries weight beyond a single hire.

The 48-year-old computer scientist was among Google's earliest employees and became one of the company's most prominent artificial intelligence researchers

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. He initially left Google in 2021 after the company declined to aggressively pursue a chatbot project he had championed, subsequently founding Character.AI with fellow researcher Daniel De Freitas

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. His expertise in pretraining makes him particularly valuable in the competitive landscape of AI development

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Strategic Timing for OpenAI's IPO Push

OpenAI gains Shazeer at a particular moment. The company confidentially filed for an initial public offering earlier this month, setting the stage for one of the most closely watched technology listings in recent years

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. Adding a researcher of Shazeer's standing to work on new model architectures is both a research move and a signal to the market about who wants to be there

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. According to reports, he will act as the organization's lead for AI architecture research

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Source: Market Screener

Source: Market Screener

Sam Altman, co-founder and CEO of OpenAI, welcomed the move enthusiastically, stating he had wanted to work with Shazeer since the very beginning of OpenAI, joking that it "only took 10 years" and would be "worth the wait"

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. For a company whose pitch rests heavily on staying at the frontier of model design, recruiting one of the transformer's co-inventors is about as direct a statement as it can make.

Implications for Google's AI Ambitions

For Google, the loss lands amid an intensifying contest with OpenAI and Anthropic across the enterprise AI stack

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. The departure comes weeks after Google unveiled new AI products, including its Gemini 3.5 Flash model and Gemini Spark AI agent, at its annual I/O developer conference

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. The Gemini models are central to Google's AI strategy, which makes the exit of one of their co-leads more than a routine personnel matter.

Source: Silicon Republic

Source: Silicon Republic

Shazeer's announcement sparked widespread discussion, with many describing the move as a significant loss for Google

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. Tech entrepreneur Yuchen Jin called the development "brutal news for Gemini," noting the $2.7 billion Google spent to bring Shazeer back before his departure

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. The move shows the limits of acqui-hires, in which the most valuable assets can walk out the door once retention periods end

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. A Google spokesperson said, "We are grateful for Noam's meaningful contributions to Google over the years and we wish him well"

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