Ep 92: xAI Co-Founder Unpacks the Future of Model Development

Igor Babuschkin, co-founder of River AI and formerly a co-founder of xAI, joins to unpack a career that spans nearly every major AI lab: he led the StarCraft and AlphaCode work at DeepMind, joined OpenAI's reasoning team years before o1 shipped, and co-founded xAI, where he helped stand up the Colossus data center in roughly 120 days and reflects candidly on what it's actually like working with Elon Musk day to day, plus what the Cursor acquisition actually unlocked for Grok's coding models. He also discusses why he left xAI to start River AI, the three bets behind it, and why he's betting on local hardware, not just software, for personal AI. On the enterprise side, he tackles whether companies will actually train their own models or if it's just a cost play, and makes the case that proprietary labs like OpenAI and Anthropic are facing a real business squeeze. He's skeptical that stacking specialized RL domains generalizes the way pre-training scale did, and is candid about the uncomfortable reality that today's frontier open-weight models are almost entirely Chinese. He closes on what's actually needed to push model progress beyond coding into non-verifiable domains, and the broader implications of where AI is headed next.

(0:00) Intro
(1:17) Writing Fiction on Where AI Is Headed
(4:46) Cracking Agents Beyond Coding
(10:29) Why Igor Left to Start River
(12:22) River's Three Big Bets
(18:06) Weights vs. Memory: The Personalization Debate
(22:04) Should Enterprises Train Their Own Models?
(25:10) Are Proprietary Labs Losing Their Edge?
(32:16) The China Open-Source Problem
(44:19) The Elon Call That Started xAI
(50:18) Thoughts on Cursor Acquisition
(52:16) What's Actually Bottlenecking AI
(56:55) Humans, Machines, and Staying Relevant
(1:01:29) Igor's Odds This All Goes Well

Jacob is an AI investor at Redpoint Ventures. He's led Redpoint's investments in companies like Abridge, Physical Intelligence & Legora. Follow Jacob on Twitter (@jacobeffron).

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