Alphabet shed about $16 billion in market value that day. The sharper question raised in the piece is what, exactly, Google lost.
In an article by Josh Kale, translated by TechFlow, Wednesday brought a rare concentration of departures and role changes at the top of Google’s AI organization. Google’s engineering ladder runs from L1 to L10, but one title sits above even Google Fellow: L11 Senior Fellow. Only two people had ever reached it in 27 years, Jeff Dean and Sanjay Ghemawat. Both resigned on Wednesday. Hours later, Nobel Prize winner Demis Hassabis said he would no longer handle the day-to-day management of Google’s AI lab.
The only two L11 Senior Fellows both resigned
Within Google’s internal ranking system, Google Fellow is the highest standard tier, and the company says the honor stays with recipients for life. Above that sits L11 Senior Fellow, a level so rare that only Dean and Ghemawat had ever held it.
Both left on Wednesday. By the close, the market had cut about $16 billion from Alphabet’s valuation.
Dean joined Google in 1999 and was one of its first 30 employees. The article says the company was then packed into an upstairs office in Palo Alto, in a building that is now a T-Mobile store. Dean and Ghemawat became one of the best-known pair-programming duos in the industry, writing core software that helped turn Google from a search engine running on cheap hardware into a global computing platform.
A 2004 paper by the pair is described in the article as a starting point for the entire big data industry. Dean later helped found Google Brain and pushed for the TPU, a chip built for AI workloads. He once estimated that if every Android user spent three minutes a day on voice search, Google would need to roughly double its data center footprint. That led the team to design the chip in 15 months. The same chip line now powers Gemini and is being shipped to external customers in competition with NVIDIA.
Hassabis steps back from daily management
Hours after Dean and Ghemawat left, Demis Hassabis said he would no longer oversee the day-to-day running of Google’s AI lab.
The article notes that Hassabis became an international chess master at 13, co-designed the game Theme Park at 17, and won the 2024 Nobel Prize in Chemistry for AlphaFold. He remains chairman of Google DeepMind and Alphabet’s chief scientist, but the management change frees him to focus on work at the highest scientific level inside the company.
Koray Kavukcuoglu, DeepMind’s CTO for more than a decade, will take over daily operations and handle work related to Gemini 4.
Discovery Loop brings together several longtime Google researchers
Dean and Ghemawat were not the only senior figures to leave. Oriol Vinyals and Quoc Le also joined the move.
According to the article, Vinyals was once a top StarCraft player in Spain, later built AlphaStar, and co-led the technical development of Gemini. Quoc Le grew up in a Vietnamese village without electricity and later helped found Google Brain. Some of the four had worked together for as long as 30 years.
Their new company, Discovery Loop, is structured as a public-benefit company. Its stated mission is to automate the experimental loop: forming hypotheses, running experiments, evaluating outcomes, and iterating thousands of times in parallel. Its first focus is the automation of machine learning research itself.
Google still sits inside that picture. The company is both a founding investor in Discovery Loop and its exclusive cloud provider.
That means the departure of top Google researchers does not fully sever the commercial link. The infrastructure relationship remains in place.
From OpenAI to Anthropic, Google alumni keep building outside Google
In 2017, Google published Attention Is All You Need, the transformer paper that made modern AI possible. The article says all eight authors have since left the company.
Former Google talent has gone on to shape companies including OpenAI and Anthropic. For years, people have compared Google to Fairchild Semiconductor, a company that kept producing star defectors who then created enormous value elsewhere.
This time, though, Google has written itself into much of the cap table.
- Google spent $2.7 billion on a Character.AI licensing deal and brought Noam Shazeer back as co-lead of Gemini.
- Google holds about 14% of Anthropic, which the article values at roughly $124 billion based on a July SEC filing.
- Google is also a founding investor in Discovery Loop.
As the article puts it, every dollar of compute burned by Dean’s new company flows back as Google Cloud revenue. Google, at minimum, is still collecting rent from the companies founded by its former stars.
There have been costs. Shazeer left again in June this year, this time for OpenAI. Nobel laureate John Jumper moved to Anthropic the next day. Gemini 3.5 Pro was delayed in July because of coding performance issues.
Model rankings may rotate, but Google’s machine is still running
The article says the picture on frontier model rankings looks weak for Google. On Polymarket, the probability that Google will launch the top-ranked AI model this year is about 7.6%. By that measure, the company looks cooked across the leaderboard.
The core argument, though, is that the more durable assets sit below the rankings. The article says Google’s business is approaching $500 billion in annual revenue and is still accelerating. Search has kept growing in the AI Overviews era, even though analysts had spent the previous three years arguing that the business would cannibalize itself. Cloud is described as the fastest-growing segment among the hyperscalers, and signed contract backlog has already exceeded $500 billion.
Google still controls search distribution, a mobile operating system, a video platform, cloud infrastructure, custom chips, and now equity stakes in major companies founded by its own top talent.
The conclusion in the piece is straightforward: the leader in frontier models may change every few months, but distribution, infrastructure, and equity stakes compound over time. What changed on Wednesday was the org chart. The machine underneath did not, and the company’s earnings have shown no signal of an imminent slowdown.