London-based Ineffable Intelligence, an AI startup founded by former DeepMind researcher David Silver, has raised $1.1 billion in a seed funding round, marking the largest such investment in Europe.
The round, led by Sequoia Capital and Lightspeed Venture Partners, values the company at approximately $5.1 billion and includes participation from major technology players and government-backed funds.
DeepMind Veteran Launches New AI Lab
Silver, known for leading key work behind AlphaGo at DeepMind, founded Ineffable Intelligence earlier this year after leaving the Google-owned lab.
The startup focuses on developing AI systems that learn through experience rather than relying on large volumes of human-generated data, building on reinforcement learning techniques.
Record-Breaking Funding Signals AI Shift
The $1.1 billion raise represents Europe’s largest seed financing to date, underscoring strong investor confidence in frontier AI research and in founder-led labs built around top-tier talent.
Despite being in its early stages and pre-revenue, Ineffable has attracted backing from leading global investors, reflecting a broader trend of capital flowing into next-generation AI approaches beyond traditional large language models.
Building AI That Learns Without Human Data
The company aims to develop systems capable of learning autonomously from interaction and experience, rather than relying primarily on human-curated datasets.
This approach could mark a shift in AI development, as researchers explore alternatives to data-intensive training methods and push toward more adaptive, self-improving systems.
Expansion Plans
Ineffable Intelligence plans to use the funding to expand its research team and invest in large-scale compute infrastructure as it advances its work in reinforcement learning and autonomous AI systems.
Andrew Lee
