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In mid-June 2026, Google lost two foundational AI researchers to rivals within 24 hours: Noam Shazeer — co-author of the 2017 transformer paper and Gemini co-lead — joined OpenAI [2][17], less than two years after Google paid $2.7 billion to reacquire him via the Character.AI deal [2]. John Jumper, 2024 Nobel chemistry laureate for AlphaFold, left Google DeepMind after nearly nine years to join Anthropic [9][10]. In a parallel development, Barret Zoph — formerly a senior OpenAI researcher who had joined Mira Murati's startup Thinking Machines Lab as CTO and co-founder — was fired after an undisclosed relationship with a colleague came to light [14], and OpenAI moved quickly to welcome him back [15].

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 highest-profile scientific result — to its two main competitors. The $2.7 billion Google spent in 2024 to retain Shazeer makes the loss financially concrete. The Zoph episode at Thinking Machines Lab adds texture to the broader picture: talent instability is not limited to Google, but the specific cause (an interpersonal firing) is distinct from the strategic departures at the center of this story.

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 roughly $2.7 billion deal in which Google acquired a technology license and reabsorbed Character.AI's talent [2]. Google placed him as VP of Engineering and co-lead of its Gemini model line [3][4]. His departure to OpenAI, reported by Reuters and CNBC on June 18, 2026, effectively ends that investment within two years [2][5]. Multiple outlets including Axios and Business Insider confirmed the move [5][6].

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 problem in computational biology [7][8]. He and DeepMind CEO Demis Hassabis were awarded the 2024 Nobel Prize in Chemistry for that work [9]. After nearly nine years at the lab, Jumper announced he is joining Anthropic [10][9]. Bloomberg and The Next Web confirmed the move [10][11]. The two departures drew wide attention because they came within roughly 24 hours of each other and because each researcher went to a different Google rival — Shazeer to OpenAI, Jumper to Anthropic — distributing the talent gain across Google's competitive landscape [12][13].

A separate thread involves Barret Zoph, who had served as a senior researcher at OpenAI before joining Thinking Machines Lab — the AI startup co-founded by former OpenAI CTO Mira Murati — as CTO and co-founder. The Wall Street Journal reported that Zoph was fired from Thinking Machines Lab after an undisclosed relationship with a colleague came to light [14]. Murati confirmed the firing, and within roughly an hour, OpenAI announced it was welcoming Zoph back [15]. Two other Thinking Machines Lab co-founders are also reported to be departing [16], adding organizational instability to that company at an early stage.