Alphabet Inc. is facing a deepening crisis of talent attrition within its artificial intelligence division. Following the recent departures of Nobel laureate John Jumper and star researcher Noam Shazeer, two more researchers central to the development of the Gemini model, Jonas Adler and Alexander Pritzel, are set to join rival firm Anthropic.
According to sources familiar with the matter, Adler led key programming directions for Alphabet's AI efforts, while Pritzel was deeply involved in the training processes for AI models. Both were internally regarded as critical contributors to the Gemini project.
This latest brain drain comes just days after the announcements of Jumper and Shazeer's departures, raising questions among investors about Alphabet's sustained competitiveness in the intensely competitive model race.
This wave of departures highlights the most heated talent war in the tech industry in recent years. Anthropic, reportedly on the cusp of an initial public offering with a valuation of $965 billion from its latest funding round, surpassing OpenAI, is potentially offering a lucrative "pre-IPO ticket" that is proving highly attractive to employees at large tech corporations.
While Alphabet has expressed confidence in its position within the AI talent market, analysts note that the concentrated outflow of high-caliber talent in a short period is difficult to ignore.
Alphabet's stock fell more than 5% on Monday following news of Jumper's departure. Upon the announcement of the latest exits, the stock dropped over 1% before paring losses to a decline of 0.61% for the day.
Reasons for the Exodus Extend Beyond Compensation
The drivers of this departure wave are not limited to compensation; internal disputes over resource allocation are also a significant factor.
According to two sources, shortly before Shazeer announced his move to OpenAI, the computing resources for a project he was leading were reallocated to a London-based team under Google DeepMind.
Alphabet stated that this move was intended to foster cross-team collaboration and optimize efficiency during the AI pre-training phase—the initial stage where models learn from vast datasets and a key battleground for computing resources in current AI development.
However, this adjustment reportedly raised questions among some researchers about prioritization and has even prompted some employees to leave the company entirely. The competition for computing power is emerging as a potential risk to talent stability within Alphabet.
Shazeer's departure is particularly symbolic. He was a co-inventor of the Transformer architecture that underpins modern AI in 2017, left Alphabet in 2021 to found the chatbot company Character.AI, returned in 2024 under a licensing agreement valuing his company at $2.5 billion, and subsequently co-led the Gemini model's development.
Prior to leaving, he was reportedly researching a new AI architecture, still based on Transformer, that had shown promising early results.
According to current and former employees, Shazeer was a figure both admired and controversial within the company, with his internal comments on issues like transgender identity and the Gaza conflict having drawn criticism from some staff.
Jumper's Team Joins Anthropic En Masse, Non-Compete Delays Start Date
Jumper, who won a Nobel Prize for breakthrough research using AI to predict protein folding, had become one of Alphabet's most recognizable AI figures. Adler and Pritzel, who are now also joining Anthropic, were core members of the team that collaborated with him on that research, effectively constituting a "team-level" departure.
Notably, while Anthropic is a direct competitor to Alphabet, it is also a partner. According to a 2025 industry analysis by venture firm SignalFire, the probability of a DeepMind engineer moving to Anthropic is nearly 11 times higher than the reverse flow.
However, UK law enforces non-compete agreements more stringently than US law. In the UK, where DeepMind's leadership is based, researchers are typically subject to longer non-compete terms. Sources indicate Jumper is not expected to begin work at Anthropic until next year.
Alphabet Stresses Talent Strength Amidst Unmistakable Competitive Pressure
In response to the ongoing departures, Google DeepMind CEO Demis Hassabis publicly addressed the situation at an event in Cannes this week.
"There's always been a lot of movement between the top labs, and we get our fair share of the top talent. We have the largest and broadest research team of any lab," Hassabis stated.
He also acknowledged, "It's an incredibly competitive market. It's the most competitive it's ever been in the history of tech."
Alphabet's predicament reflects a broader structural tension within the AI industry: while large tech companies possess computing power, data, and capital, they are finding it increasingly difficult to retain top talent who are drawn to the IPO prospects and greater research autonomy offered by promising startups.
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