AlphaGo creator David Silver raises record $1.1 billion seed round…

Team S · 2026-05-07T14:35:48.000Z

Ineffable Intelligence, a London-based AI lab founded by former Google DeepMind researcher David Silver, has emerged from stealth with $1.1 billion in seed funding at a $5.1 billion valuation — the largest seed round ever raised by a European startup. The round was co-led by Sequoia Capital and Lightspeed Venture Partners, with participation from NVIDIA, Google, DST Global, Index, Flying Fish Ventures, and the UK's Sovereign AI Fund, among others. Sequoia managing partners Alfred Lin and Sonya Huang reportedly flew to London personally to secure the deal. Silver is one of the most credentialled figures in modern AI. Over more than a decade at DeepMind, he led the creation of AlphaGo — the first AI to defeat a professional Go player, watched by 200 million people across Asia — followed by AlphaZero, which mastered Go, Chess, and Shogi from scratch through pure self-play without human data, and AlphaStar, which reached professional level in StarCraft II. He also contributed to Google's Gemini family of models before leaving DeepMind in late 2025. He holds a professorship at University College London and earned his doctorate at the University of Alberta under Richard Sutton, widely regarded as the father of reinforcement learning. Incorporated in November 2025, Ineffable Intelligence has no product, no revenue, and no public roadmap. Its thesis is a direct challenge to the prevailing paradigm of AI development. Silver argues that large language models are fundamentally limited because they learn from human-generated data, meaning they can extend and remix existing knowledge but cannot discover something genuinely new. Reinforcement learning, by contrast, allows AI to learn from interaction with its environment — discovering novel strategies no human has conceived. The company aims to build a "superlearner" that acquires all knowledge from its own experience, from basic motor skills through to what Silver describes as profound intellectual breakthroughs. Silver has also committed to donating 100% of his personal equity gains from Ineffable to high-impact charities via Founders Pledge — described as the largest single pledge in the organisation's history. The round places Ineffable alongside a small group of "coconut round" AI startups — a term coined for pre-product seed rounds so large they dwarf traditional venture norms — including AMI Labs, co-founded by Turing Award winner Yann LeCun, which raised $1.03 billion last month.

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AlphaGo creator David Silver raises record $1.1 billion seed round… | Newnex