John Jumper joins Anthropic: DeepMind loses AlphaFold lead

John Jumper, the Nobel Prize winner who led DeepMind’s AlphaFold team, left Google DeepMind to join Anthropic on June 19, 2026 after nearly nine years at the company. Jumper shared the 2024 Nobel Prize in Chemistry with DeepMind CEO Demis Hassabis for developing AlphaFold, the system credited with transforming protein structure prediction.

Who left and where did they go?

John Jumper left DeepMind to join Anthropic, departing after nearly nine years and bringing direct AlphaFold leadership to a rival. DeepMind CEO Demis Hassabis thanked Jumper for their "extraordinary partnership" and said AlphaFold had "changed the world," underscoring Jumper’s central role on the team that won the 2024 Nobel Prize in Chemistry.

The article places Jumper’s move alongside a cluster of exits. It says Gemini co-lead Noam Shazeer left for OpenAI shortly before Jumper’s departure, and that David Silver had earlier left DeepMind to start his own startup focused on world models and reinforcement learning.

How does this fit into recent DeepMind departures?

Jumper’s exit is the latest in a short sequence that the piece describes as worsening in timing: Noam Shazeer left for OpenAI weeks earlier, and within weeks Anthropic and OpenAI poached two of Google’s most important researchers. Before those departures, David Silver left to found his own company working on world models and reinforcement learning.

Those lines frame the move as part of a broader churn at DeepMind. The source emphasizes the sequence: first Silver’s departure to start a startup, then Shazeer’s move to OpenAI, then Jumper’s jump to Anthropic, which collectively signals multiple high-profile losses in a compressed period.

Why it matters

This matters because Jumper was a leadership figure on AlphaFold, a project singled out by the shared 2024 Nobel Prize in Chemistry. Losing a Nobel laureate and a team lead reduces institutional continuity on one of DeepMind’s signature scientific achievements, and it hands Anthropic a high-profile hire with proven impact in applied scientific AI. The timing compounds the impact, since the article notes these exits happened within weeks of one another and just as Google prepares a new model release.

What else is happening at Google around this departure?

The article reports that Gemini 3.5 Pro is reportedly set to launch in late June, but insider rumors in the piece suggest it may not be competitive with the latest models from Anthropic and OpenAI. That juxtaposition—multiple senior departures and a contested product launch—frames risk to DeepMind’s product and research momentum.

What to watch

Watch Anthropic’s public announcements and hiring disclosures for how Jumper is integrated and what role he will play on research or product teams. Also watch Gemini 3.5 Pro’s public launch timing in late June and early performance comparisons to new Anthropic and OpenAI models, which the source implies will be the immediate measure of competitive position.

Source-attributed facts in this brief: Jumper shared the 2024 Nobel Prize in Chemistry with Demis Hassabis; Jumper left DeepMind for Anthropic after nearly nine years; Gemini 3.5 Pro is reportedly set to launch in late June; Noam Shazeer left for OpenAI shortly before Jumper; David Silver left earlier to start his own startup focused on world models and reinforcement learning. Demis Hassabis thanked Jumper for their "extraordinary partnership" and said AlphaFold had "changed the world."