David Silver just raised $1.1 billion for a company that's only a few months old. Ineffable Intelligence, the British AI lab Silver founded after leaving DeepMind, now sits at a $5.1 billion valuation. The pitch: build a "superlearner" that discovers knowledge entirely on its own, no human data required. If that sounds familiar, it's because Silver spent over a decade at DeepMind doing exactly this kind of work. He led the team behind AlphaZero, the program that taught itself to dominate chess and Go through pure trial and error, beating the best computer programs without ever studying human games.
Just last month, Yann LeCun's AMI Labs raised $1.03 billion. These two compete for funding, sure, but they're also pushing fundamentally different visions of how AI should work. Silver is all-in on reinforcement learning: agents learn by doing, maximizing rewards through self-play. LeCun, who co-founded AMI Labs after leaving Meta, favors self-supervised learning and what he calls "World Models," where AI builds internal representations of how the world works rather than just learning which actions score points. Ineffable's own site compares its potential impact to Darwin's theory of evolution. That's the bet: intelligence emerges from exploring and refining strategies, similar to AI solving new research problems, not from predicting the world.
Sequoia Capital and Lightspeed Venture Partners led Ineffable's round, with Google, Nvidia, Index Ventures, the British Business Bank, and the UK's new Sovereign AI fund all joining. The round makes Ineffable a "pentacorn" in industry slang, a seed-stage company valued north of $5 billion. Recursive Superintelligence, co-founded by former DeepMind principal scientist Tim Rocktäschel, reportedly pulled in $500 million with enough demand to reach $1 billion. These are "coconut rounds," jokingly named as an escalation from "seed."
London is becoming the common thread. DeepMind's presence after its 2014 Google acquisition built a dense network of AI talent, and now alumni are spinning out with enormous backing. Silver has recruited several former DeepMind colleagues to Ineffable's executive team, according to TechCrunch. Jeff Bezos' Project Prometheus is also reportedly hunting for London office space near Google's AI hub. For anyone tracking where the next wave of AI companies will emerge, King's Cross keeps coming up.