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David Silver

Founder

Now Founder, Ineffable Intelligence

Latest on AI4S.fyiInterview · Oct 13Ineffable's two founders: no human data and no pre-training, first build an agent that learns for itself in simulated worlds

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Affiliations

Current

Founder · Ineffable Intelligenceas of 2026-04-27gov.uk ↗sequoiacap.com ↗

Also named in the companies' announcements: Google DeepMind

Current roles come from these dated records, not from the bio below. Each links the page it was read from.

Founded

Ineffable IntelligenceScience models and AI scientists · 1 round on record · disclosed $1.1B · Seed $1.1B
Background: Google DeepMind (head of reinforcement learning; AlphaGo, AlphaZero), University College London (professor) (as the company's own announcements put it)
Co-founders: Lasse Espeholt, Chris Apps, Wojciech Czarnecki, Junhyuk Oh, Alexandre Laterre, Heather Gorham
Backed bySequoia Capital Lightspeed Venture Partners

Interviews

2026-10-13Ineffable's two founders: no human data and no pre-training, first build an agent that learns for itself in simulated worlds · Training Data (Sequoia Capital)

On the timeline

2026-04-27David Silver's Ineffable Intelligence comes out of stealth with a $1.1B seed round co-led by Sequoia and Lightspeed, at a $5.1B valuation

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