Nobel Prize winner John Jumper is leaving Google DeepMind to join Anthropic, the AI startup behind Claude. Jumper, who shared the 2024 Nobel Prize in Chemistry with DeepMind CEO Demis Hassabis for their work on AlphaFold, announced the move in a post on X on Friday, June 20.
AlphaFold Creator Departs Google After Nearly Nine Years
Jumper joined DeepMind just six months after completing his PhD and quickly rose to lead the AlphaFold team, the AI system that predicted the 3D structure of proteins from their genetic sequences. That breakthrough fundamentally changed how biologists study disease, drug discovery, and enzyme design.
In his announcement, Jumper credited Hassabis for “taking a real chance” on him at such an early career stage and praised the DeepMind team for teaching him how to do great science. He said he would “still be excited to hear about what amazing things they discover next.”
According to Bloomberg, Jumper had also been a key member of Google’s team developing coding tools, a product line the company has struggled to sell to businesses. His departure signals a potential shift in Google’s AI research priorities.
Not the Only Big Exit From DeepMind This Week
Jumper’s move is not an isolated incident. Noam Shazeer, the co-founder of Character AI, also announced this week that he is leaving DeepMind. Unlike Jumper, Shazeer is heading to OpenAI, Anthropic’s biggest competitor.
Together, these departures represent a significant brain drain from Google DeepMind, one of the most storied AI research labs in the world. The talent war between OpenAI, Anthropic, and Google has intensified in 2026, with each company offering senior researchers equity, autonomy, and the chance to shape AI products at scale.
What AlphaFold Changed About Science
Before AlphaFold, determining a protein’s 3D structure could take months or even years using techniques like X-ray crystallography. AlphaFold solved this problem computationally, and Google released the predicted structures of nearly all known proteins (over 200 million) in 2022. The AlphaFold Protein Structure Database has been accessed by researchers in more than 190 countries.
Jumper and Hassabis received the Nobel Prize specifically for this contribution, which the Nobel Committee recognized as a breakthrough that “benefits all of humanity.”
Anthropic’s AI Hiring Spree
Anthropic has been aggressively expanding its research team in 2026. The company, founded by former OpenAI executives Dario and Daniela Amodei, recently raised additional funding at a valuation exceeding $60 billion. Anthropic’s Claude models have gained market share in the AI assistant space, and the company has been pushing into coding tools, enterprise solutions, and scientific research.
Adding a Nobel laureate to the roster gives Anthropic significant credibility in the scientific AI space, an area where Google DeepMind has historically dominated. Anthropic has been investing in AI safety research alongside capabilities work, which may have appealed to Jumper’s academic sensibilities.
Google’s Response and What Comes Next
Google has not publicly commented on Jumper’s departure. The company still retains significant AI talent, including Hassabis himself, who continues to lead DeepMind. However, losing two prominent researchers in the same week raises questions about how effectively Google can retain its top AI scientists as competitors offer increasingly attractive packages.
For Anthropic, Jumper’s hire strengthens its position heading into the second half of 2026, where the company is expected to release new Claude models with enhanced reasoning and multimodal capabilities.
