Jeff Dean, Google's chief scientist and 30th employee, departed Google in late July or early August 2026 after nearly 27 years at the company, along with three other senior AI researchers: Sanjay Ghemawat, Oriol Vinyals, and Quoc Le [1, 2, 3, 4, 5]. Together, they founded Discovery Loop, a Public Benefit Corporation with a mission to automate machine learning, science, and engineering in order to accelerate discoveries [1, 6, 7, 2, 3]. Dean announced the new startup publicly on August 5, 2026 [6, 8, 3].

Discovery Loop aims to develop AI systems capable of recursive self-improvement to speed progress in AI and scientific breakthroughs across fields such as drug discovery, materials science, and hardware design [1, 7, 2, 3]. The startup plans to automate experimental loops, enabling thousands of parallel experiments to increase both experiment quantity and quality, as Dean explained: "We think there is opportunity for A.I. to more fully automate what has traditionally been a very human-intensive experimental loop. You will get both a higher quantity and a higher quality of experiments, and that will lead to scientific breakthroughs and advances." [1]

The founding team has a deep shared history, having worked together for 14 to 30 years at Google on major technologies including Search, Ads, Gmail, TPUs, Gemini, AutoML-Zero, and Google Brain [1, 6, 7, 2, 8, 3]. Dean himself played a central role in building Google's AI strategy and foundational infrastructure that supports 8.5 to 14 billion daily search queries [1, 2, 4].

Discovery Loop’s initial funding round is co-led by Radical Ventures and Khosla Ventures, with participation from Alphabet, Kleiner Perkins, Lightspeed, and Doerr Capital [7, 8, 3]. Google (Alphabet) retains an equity stake in the startup and will act as a cloud provider partner [7, 3]. Dean will serve as CEO of Discovery Loop [7].

The announcement coincided with broader leadership shifts at DeepMind, Google's AI subsidiary. Demis Hassabis stepped down as CEO of DeepMind to become chairman, while Koray Kavukcuoglu took over as CTO reporting directly to Alphabet CEO Sundar Pichai [5]. Alphabet's stock fell as much as 5.5% on August 5 amid concerns over the leadership changes and Dean’s departure, with Google’s stock dropping about 4% specifically after news of Dean leaving [4, 5].

Google CEO Sundar Pichai thanked Dean for his work over nearly three decades: "I also want to give a huge thanks to the incomparable @JeffDean after an incredible 27-year run at Google." [3]

Jeff Dean and his cofounders officially announced Discovery Loop and shared related pitch materials on August 5, 2026 [6, 8, 3].