Jeff Dean Leaves Google After 27 Years to Co-Found Discovery Loop
Google's chief scientist Jeff Dean is leaving the company after nearly 27 years to co-found Discovery Loop, a startup that aims to automate the full experimental cycle of scientific research. The departure, announced on August 5, is part of a broader restructuring of Google's AI leadership that also shifts Demis Hassabis out of day-to-day operations at Google DeepMind.
The departures
Dean is not leaving alone. Three other senior Google AI figures are joining him as co-founders: Sanjay Ghemawat, a Google Senior Fellow who collaborated with Dean on MapReduce, BigTable, Spanner, and TensorFlow; Oriol Vinyals, VP of research at Google DeepMind and a technical lead on Gemini; and Quoc Le, a co-founder of Google Brain and the researcher behind AutoML-Zero.
The group's combined track record spans some of the most consequential infrastructure in modern computing: Google File System, MapReduce, BigTable, Spanner, TensorFlow, TPUs, AlphaFold, Gemini, sequence-to-sequence models, and chain-of-thought reasoning.
Discovery Loop is incorporated as a public benefit corporation. Google is a founding investor, will serve as its cloud partner, and will supply compute for the venture's first year. Khosla Ventures and Radical Ventures are also backing the company, though the founders have not disclosed the round's size or valuation. Wired reported that Radical managing partner Jordan Jacobs will join the board.
What Discovery Loop plans to build
The company's mission is to build AI systems that can run the full experimental loop: proposing hypotheses, implementing and executing experiments, evaluating results, and iterating, at a scale sequential human effort cannot match. The plan has three stages.
First, Discovery Loop will focus on automating machine learning research itself, using frontier models and large-scale compute to propose, run, and learn from experiments. Second, it will use those automated capabilities to optimize its own technology stack, becoming its own first customer. Third, it intends to generalize to any field with measurable outcomes, initially targeting chip design, biology, drug discovery, and materials science, and eventually the National Academy of Engineering's Grand Challenges.
Quoc Le told Wired he hopes the system might discover new architectures. "I'm very excited about automating machine learning," he said. "It might be that we will discover a different transformer architecture."
Oriol Vinyals identified a key capability gap the effort must bridge: current models are not strong at generating genuinely novel hypotheses. "One of the things that we'll be obviously very focused on is how these models come up with new ideas to try," he said. "That's not something that currently they're super strong at."
The founders described early systems that will co-develop ideas with human researchers, with deeper automation as the longer-term goal.
The Google reshuffle
Alongside Dean's departure, Demis Hassabis is stepping back from day-to-day leadership of Google DeepMind to become its chair and Alphabet's chief scientist. Hassabis will continue to lead Isomorphic Labs, Alphabet's AI-driven drug discovery unit. In a message to staff, he said the "number one application of AI should be to improve human health" and that he wants to focus on demonstrating AI's value by helping to cure diseases.
Koray Kavukcuoglu, previously DeepMind's CTO and Google's chief AI architect, takes over as SVP of Google DeepMind, reporting directly to CEO Sundar Pichai. He will oversee Gemini model development, frontier AI research, and the Gemini app and developer teams.
Pichai disclosed metrics that illustrate the scale of what Kavukcuoglu inherits: the Gemini app has passed 950 million monthly users, and Gemma open models have surpassed 900 million downloads. Google will continue working with Discovery Loop as a research framework partner.
What it means
The simultaneous departure of four of Google's most senior AI researchers, including its chief scientist and two Google Brain co-founders, signals a structural shift in where top talent wants to work. Discovery Loop's public benefit corporation structure suggests the founders want freedom from quarterly earnings cycles, but Google's role as founding investor and compute provider also means the ties are not severed. The arrangement looks less like a clean break and more like a spin-out with a strategic anchor tenant.
The near-term observable is Discovery Loop's recruiting effort: the company is hiring a lean, in-person founding team and has no office yet. Its first milestone is the automated ML loop it plans to turn on its own stack. Whether it produces results the field recognizes as scientific discovery rather than optimization will determine whether the venture is remembered as a footnote or a fork in the road.
Sources
Jeff Dean Leaves Google to Automate the Scientific Method With Discovery Loop - Unite.AI: https://www.unite.ai/jeff-dean-leaves-google-to-automate-the-scientific-method-with-discovery-loop/
Google just announced a major shakeup of its top AI leadership - The Verge: https://www.theverge.com/tech/975677/google-deepmind-ai-demis-hassabis-shakeup
Our next chapter of AI momentum - Google Blog (Sundar Pichai): https://blog.google/company-news/inside-google/message-ceo/next-chapter-ai-momentum/
Jeff Dean's Next Act - Wired: https://www.wired.com/story/jeff-dean-google-discovery-loop-startup/
