Ineffable Intelligence
Core neolabReinforcement-learning research lab building a 'superlearner' that learns from experience, not human data
Key facts
| Field | Value | Source · checked |
|---|---|---|
| Classification | Core neolabReinforcement-learning research lab founded by David Silver, formerly of Google DeepMind; $1.1B seed at $5.1B valuation (Apr 2026) | |
| Founded | 2025 | cnbc.com was founded in late 2025 by UCL professor and former lead of DeepMind's reinforcement learning team, David Silverchecked 9 Nov 2026 |
| Headquarters | London, GB | |
| Founders | David Silver | |
| Website | ineffable.ai | ineffable.ai Ineffable Intelligence is an AI research company whose mission is to make first contact with superintelligence.checked 9 Nov 2026 |
| Careers | jobs.ashbyhq.com3 open roles on 9 Nov 2026 | ineffable.aichecked 9 Nov 2026 |
| Profiles and work | X @IneffableLabsLinkedIn | How links are checkedchecked 10 Nov 2026 |
Funding rounds
Ineffable Intelligence has raised $1.1B in rounds confirmed by the company, a regulator or two independent outlets. Sources disagree on at least one confirmed round, so the total may count some money twice; see the note on that round. Status rules: methodology.
| Date | Round | Amount | Valuation | Investors | Status | Source · checked |
|---|---|---|---|---|---|---|
| 27 Apr 2026 | Seed | $1.1B | $5.1B | Lead: Sequoia, Lightspeed Venture Partners; NVIDIA, DST Global, Index Ventures, Google, British Business Bank, UK Sovereign AI Fund | Confirmedsources conflict | SEC EDGAR Form D: total offering 1111419525.0, total sold 1104867535.0, first sale 2026-04-17+3 more sourceschecked 10 Nov 2026 |
Notes on these rounds
- 27 Apr 2026 Seed: The reported $4B valuation plus the $1.1B raised is consistent with $5.1B; neither outlet states the basis of the $5.1B. Form D filed 2026-05-01 (CIK 0002128735).
People
| Name | Role | Before | Now | Source · checked |
|---|---|---|---|---|
| David SilverLinkedIn | Founder & CEO | Google DeepMind (Lead, reinforcement learning team), University College London (Professor) | Current | cnbc.com was founded in late 2025 by UCL professor and former lead of DeepMind's reinforcement learning team, David Silverchecked 9 Nov 2026 |
Professional facts from public sources only. How people records are handled.
Latest posts on X
The most recent posts from @IneffableLabs, the X account of Ineffable Intelligence, quoted as posted. Replies and reposts are left out. How posts are selected.
“So that's what we're out to do; to build systems that can discover everything.” Our CEO David Silver cohosted @NVIDIAGTC pre-game show, discussing Ineffable's path to the discovery and the science of superintelligence -- all built on @nvidia GPU. youtube.com/watch?v=PrA_ayyy22E
A closer look at how we think about the path to superintelligence at Ineffable. David Silver and Lasse Espeholt joined Sonya to talk about the opportunity ahead. Thanks for having us!
We're building on the largest @nvidia Vera Rubin NVL72 GPU cluster on @googlecloud. This is going to be really fun :)
Commonly cited, checked
Figures and statements about Ineffable Intelligence that circulate in lists and summaries, and what the sources support.
| Claim | Finding | Source |
|---|---|---|
| Raised a $1.1B seed round in April 2026 | Confirmed by CNBC and TechCrunch. | cnbc.com announced Monday a record $1.1 billion seed round for his months-old startup |
| Investors include Sequoia, Lightspeed, Nvidia, Google, Index and UK Sovereign AI | Confirmed; also DST Global; Sequoia and Lightspeed co-led. Wired (via TechCrunch) names British Business Bank and Sovereign AI | cnbc.com with participation from |
| Founded in 2025 | CNBC reports the company was founded in late 2025. | cnbc.com was founded in late 2025 by UCL professor |
Work at Ineffable Intelligence, or see something wrong? Update this profile with a public source. How corrections work.