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In mid-June 2026, Google lost two foundational AI researchers to rivals within 24 hours: Noam Shazeer — transformer co-author and Gemini co-lead — joined OpenAI on June 18 [2][5][7], less than two years after Google spent roughly $2.7 billion to reacquire him via the Character.AI deal [2]. The next day, John Jumper — 2024 Nobel laureate in Chemistry and AlphaFold co-creator — left Google DeepMind after nearly nine years to join Anthropic [11][12][14]. A third long-tenured Google employee, Chrome engineering lead Addy Osmani, also announced a departure in the same week after 14 years [22]. Separately, Barret Zoph was fired from Mira Murati's Thinking Machines Lab and returned to OpenAI within hours [23][24].

The Shazeer and Jumper departures remove two architects of Google's core AI capabilities — one who helped invent the dominant model architecture, one who delivered its most prominent scientific result — to its two main competitors. The $2.7 billion Google paid to retain Shazeer in 2024 makes the loss financially concrete and raises questions about whether financial incentives can hold senior researchers when competitors offer different opportunities.

Noam Shazeer co-authored 'Attention Is All You Need' in 2017, the paper that introduced the transformer architecture now underlying virtually every major language model [1]. After leaving Google to co-found Character.AI, he was brought back in 2024 as part of a deal in which Google paid approximately $2.7 billion for a technology license and reabsorbed the company's talent, placing him as VP of Engineering and co-lead of its Gemini model line [2][3][4]. On June 18, 2026, Reuters and CNBC reported he was leaving Google to join OpenAI, effectively ending that investment within two years [2][5][6][7]. Commentators noted that Shazeer's background — spanning the original transformer paper, co-founding Character.AI, and co-leading Gemini — made him among the most consequential individual hires in recent AI history [8].

John Jumper's departure came the following day. Jumper led the team at Google DeepMind that built AlphaFold, the protein-structure prediction system that resolved a decades-old challenge in computational biology [9][10]. He and DeepMind CEO Demis Hassabis were awarded the 2024 Nobel Prize in Chemistry for that work [11]. After nearly nine years at the lab, Jumper announced he is joining Anthropic [12][11]. Bloomberg and other outlets confirmed the move, which generated broad international coverage across multiple languages [12][13][14][15][16][17].

The two departures came within roughly 24 hours of each other, with each researcher going to a different Google rival — Shazeer to OpenAI, Jumper to Anthropic — distributing the talent gain across Google's competitive landscape [18][19]. Social media commentary treated the pairing as historically unusual: observers noted Google lost the transformer co-inventor and the AlphaFold creator in the same week to two separate competitors [19][20][21]. In the same period, Chrome engineering lead Addy Osmani announced he was leaving Google after 14 years, drawing additional commentary as part of the same broader departure pattern [22].

A separate subplot involves Barret Zoph, who had left OpenAI to co-found Thinking Machines Lab — the startup led by former OpenAI CTO Mira Murati — serving as its CTO. The Wall Street Journal reported he was fired after an undisclosed relationship with a colleague came to light [23]. Murati confirmed the firing, and within roughly an hour, OpenAI announced it was welcoming Zoph back [24]. Two other Thinking Machines Lab co-founders are also reported to be departing [25], adding organizational instability to that company at an early stage.