Nobel laureate John Jumper leaves Google DeepMind for Anthropic after nearly nine years

Nobel laureate John Jumper, the Google DeepMind vice president who created AlphaFold, announced on June 19, 2026 that he is leaving the company after nearly nine years to join Anthropic. Jumper said on X that he would take time to recharge before starting at the Claude maker, a move confirmed by both Google DeepMind and Anthropic.

Jumper shared the 2024 Nobel Prize in Chemistry with DeepMind co-founder Demis Hassabis for developing AlphaFold2, an AI system that predicts protein structures from amino acid sequences. At 39, he became the youngest chemistry Nobel laureate in more than 70 years. AlphaFold2 has been used by over two million scientists across 190 countries.

A Second Major Departure in 48 Hours

The departure lands one day after Gemini co-lead Noam Shazeer announced he was leaving Google for OpenAI. Shazeer co-authored the seminal 2017 "Attention Is All You Need" paper that underpins modern large language models. Google had reportedly paid $2.7 billion to bring him back from Character.AI less than two years ago. The back-to-back losses mark a sharp talent drain for Google's AI operations.

Key facts about the departures:

• Jumper leaves a position as vice president at Google DeepMind, where he led the AlphaFold team six months after finishing his PhD.
• Shazeer's move to OpenAI follows a $2.7 billion deal to return to Google in 2024.
• A separate AlphaGo researcher, David Silver, recently left to start his own company.
• Industry analyses indicate DeepMind engineers have been leaving for Anthropic at a ratio of nearly 11 to 1.

Anthropic's Bet on Biology

Anthropic has been expanding aggressively into life sciences. In April 2026, it acquired Coefficient Bio, a stealth biotech startup, for $400 million in stock. The deal brought former Genentech computational biology researchers into Anthropic's healthcare division, led by Eric Kauderer-Abrams, who aims to run "a meaningful percentage of all of the life science work in the world on Claude." Jumper's expertise in protein folding gives that ambition significant scientific credibility.

The hire underscores a strategic push. Anthropic's Claude Code has driven recent revenue growth, and the company sees an opportunity to dominate AI for science. Whether Jumper can replicate AlphaFold-level breakthroughs outside DeepMind remains uncertain. For Google DeepMind, the loss raises questions that neither prestige nor money seems able to answer. A spokesperson said the company is "grateful for his contributions." But the exodus suggests deeper issues beyond compensation.