Ineffable Intelligence raises $1.1B seed at $5.1B valuation to build ‘superlearner’ AI that learns like humans

A new AI startup from David Silver just pulled off something rarely seen in Europe: a $1.1 billion seed round. The company, Ineffable Intelligence, now carries a $5.1 billion valuation, setting a new bar for early-stage funding across the region and drawing attention from Silicon Valley’s biggest names.

The round was led by Sequoia Capital and Lightspeed Venture Partners, with participation from Nvidia and Google. The UK government is backing the effort as part of its Sovereign AI push, with the British Business Bank committing additional capital as it builds out a domestic portfolio of AI bets.

For Silver, one of the leading researchers behind DeepMind’s breakthroughs, this is a continuation of a long-standing idea: machines should learn by doing, not just by reading. Ineffable is built around that premise. Instead of training models on static datasets, the company is working on systems that interact with their environment, test ideas, and refine their behavior through experience.

The approach is closer to how humans learn. A child doesn’t absorb knowledge from a fixed dataset. They experiment, fail, adjust, and try again. Ineffable is aiming for that same loop at scale, across domains that range from physical movement to abstract reasoning.

Former DeepMind Researcher David Silver Raises $1.1B Seed to Build AI That Learns Without Human Data in Europe’s Largest AI Funding Round

The company’s goal is to build what it calls a “superlearner,” a system that can develop skills and discover knowledge without relying on human-generated data as its primary input. That vision, if it works, could push AI beyond pattern recognition into something more open-ended, where systems generate their own paths to solutions.

The UK government sees that ambition as strategically important. “We believe in this nation’s entrepreneurs and innovators, and we are backing them to seize the benefits of AI for the UK,” technology minister Liz Kendall said in a statement. “This investment in Ineffable will support a company at the very frontier of AI, with the potential to transform entire sectors.”

Kendall added: “Sovereign AI is our bet on Britain – we believe in this nation’s entrepreneurs and innovators and we are backing them to seize the benefits of AI for the UK. This investment in Ineffable will support a company at the very frontier of AI, with the potential to transform entire sectors, underlining our determination to ensure that the UK isn’t just an AI taker but an AI maker. It also demonstrates Sovereign AI moving at real speed – locking down its second direct investment in just a couple of months, while also securing a really effective partnership with the British Business Bank.”

The British Business Bank confirmed it has invested $20 million into Ineffable, adding to a growing list of AI positions that includes companies like Wayve and PolyAI. The move signals a broader effort to keep foundational AI development anchored in the UK as global competition intensifies.

“Separately, the British Business Bank said it had ​invested $20 million in Ineffable, adding to an AI portfolio ​that includes nine investments over the past 12 months, among them ‌Wayve ⁠and PolyAI,” Reuters reported.

For investors, the size of the round reflects a growing belief that the next leap in AI won’t come from scaling existing models alone. It will come from changing how those systems learn in the first place. Ineffable is placing a large bet on that shift—and now it has the capital and the backing to try to prove it.