A new artificial intelligence lab called Ineffable Intelligence founded in the United Kingdom has raised $1.1 billion in seed funding, making it the largest early-stage funding round in Europe’s tech history.
Ineffable Intelligence is now valued at approximately $5.1 billion. The round was led by major venture capital firms including Sequoia Capital and Lightspeed Venture Partners, with participation from NVIDIA, Google, DST Global, Index Ventures, EQT, BOND, and Flying Fish.
Public sector backing also played a role, including investment from the UK Sovereign AI Fund and a £20 million commitment from the British Business Bank.
Ineffable Intelligence is not building what most people might recognize as a typical chatbot or language model company. Instead, it is pursuing a more ambitious and more uncertain goal.
Ineffable Intelligence is trying to build what it calls a “superlearner”: an AI system that learns entirely from its own experience rather than from human-made datasets like internet text or images.
The idea is to use reinforcement learning so the system can explore, make mistakes, and improve on its own, starting from basic interactions and gradually developing increasingly complex abilities, potentially up to scientific discovery and general problem-solving.
In the long run, the goal is to create an intelligence that can independently discover knowledge, much like humans do, but at a much larger scale and speed, and eventually surpass human-level intelligence by learning directly from the world instead of imitating human knowledge.
At the center of that ambition is its founder, David Silver, a longtime AI researcher who helped lead some of the most famous breakthroughs in modern machine learning.
Silver previously spent over a decade at Google DeepMind, where he led the reinforcement learning team behind landmark systems such as AlphaGo, AlphaZero, and AlphaStar. He is also a professor at University College London, and is widely regarded as one of the key figures in the development of modern reinforcement learning.
Silver’s scientific journey began far from billion-dollar funding rounds.
As a child, he competed in national Scrabble tournaments in the UK. Even then, colleagues recall, he was less focused on winning than on understanding strategy, on what it means to “play well.”
That fascination carried through his academic and professional life. At Cambridge University, he studied computer science and co-founded a video game company. Later, he completed a PhD in artificial intelligence and eventually joined DeepMind, where his work would reshape the field.
“Intelligence is not something pre-programmed from human knowledge. It is something discovered.”
Silver has described intelligence as a process of continuous experimentation, millions of small discoveries that accumulate into complex behavior. Creativity, in this view, is not a rare spark, but the result of constant trial and error.
Ineffable Intelligence is part of a broader wave of AI startups led by prominent researchers leaving big tech companies to pursue independent labs focused on long-term research.
These include firms such as Safe Superintelligence, founded by former OpenAI chief scientist Ilya Sutskever, and Recursive Superintelligence, among others, all of which are exploring different paths toward more general forms of machine intelligence.
What unites these efforts is a shared belief that current AI systems, while powerful, are still limited in how they learn and adapt.
The UK government has also become increasingly involved in supporting the sector. The Sovereign AI Fund and British Business Bank have both made targeted investments in AI companies and university spinouts in recent years.
Officials argue that AI will be central to future economic growth, scientific discovery, and national security.
Silver has described Ineffable Intelligence as a long-term research effort rather than a short-term product company. He has also pledged to donate any personal financial gains from the company to charity through the Founders Pledge initiative.
