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Lenny's PodcastDr. Fei-Fei Li: Why world models come next, not bigger LLMs
Through ImageNet, AlexNet, and GPUs the modern AI recipe was set; today's LLMs cannot reliably count chairs in a video, and world models are how that changes.
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Episode Details
EPISODE INFO
- Released
- November 16, 2025
- Duration
- 1h 19m
- Channel
- Lenny's Podcast
- Watch on YouTube
- ▶ Open ↗
EPISODE DESCRIPTION
Dr. Fei-Fei Li is known as the “godmother of AI.” She’s been at the center of AI’s biggest breakthroughs for over two decades. She spearheaded ImageNet, the dataset that sparked the deep-learning revolution we’re living right now, served as Google Cloud’s Chief AI Scientist, directed Stanford’s Artificial Intelligence Lab, and co-founded Stanford’s Institute for Human-Centered AI. In this conversation, Fei-Fei shares the rarely told history of how we got here—including the wild fact that just nine years ago, calling yourself an AI company was basically a death sentence. *We discuss:*
- How ImageNet helped spark the AI explosion we’re living through
- Why world models and spatial intelligence represent the next frontier in AI, beyond large language models
- Why Fei-Fei believes AI won’t replace humans but will require us to take responsibility for ourselves
- The surprising applications of Marble, from movie production to psychological research
- Why robotics faces unique challenges compared with language models and what’s needed to overcome them
- How to participate in AI regardless of your role
*Brought to you by:* Figma Make—A prompt-to-code tool for making ideas real: https://www.figma.com/lenny/ Justworks—The all-in-one HR solution for managing your small business with confidence: https://www.justworks.com/ Sinch—Build messaging, email, and calling into your product: https://sinch.com/lenny *Transcript:* https://www.lennysnewsletter.com/p/the-godmother-of-ai *My biggest takeaways (for paid newsletter subscribers):* https://www.lennysnewsletter.com/i/178223233/my-biggest-takeaways-from-this-conversation *Where to find Dr. Fei-Fei Li:*
- X: https://x.com/drfeifei
- LinkedIn: https://www.linkedin.com/in/fei-fei-li-4541247
- World Labs: https://www.worldlabs.ai
*Where to find Lenny:*
- Newsletter: https://www.lennysnewsletter.com
- X: https://twitter.com/lennysan
- LinkedIn: https://www.linkedin.com/in/lennyrachitsky/
*In this episode, we cover:* (00:00) Introduction to Dr. Fei-Fei Li (05:31) The evolution of AI (09:37) The birth of ImageNet (17:25) The rise of deep learning (23:53) The future of AI and AGI (29:51) Introduction to world models (40:45) The bitter lesson in AI and robotics (48:02) Introducing Marble, a revolutionary product (51:00) Applications and use cases of Marble (01:01:01) The founder’s journey and insights (01:10:05) Human-centered AI at Stanford (01:14:24) The role of AI in various professions (01:18:16) Conclusion and final thoughts *Referenced:*
- From Words to Worlds: Spatial Intelligence Is AI’s Next Frontier: https://drfeifei.substack.com/p/from-words-to-worlds-spatial-intelligence
- World Lab’s Marble GA blog post: https://www.worldlabs.ai/blog/marble-world-model
- Fei-Fei’s quote about AI on X: https://x.com/drfeifei/status/963564896225918976
- ImageNet: https://www.image-net.org
- Alan Turing: https://en.wikipedia.org/wiki/Alan_Turing
- Dartmouth workshop: https://en.wikipedia.org/wiki/Dartmouth_workshop
- John McCarthy: https://en.wikipedia.org/wiki/John_McCarthy_(computer_scientist)
- WordNet: https://wordnet.princeton.edu
- Game-Changer: How the World’s First GPU Leveled Up Gaming and Ignited the AI Era: https://blogs.nvidia.com/blog/first-gpu-gaming-ai
- Geoffrey Hinton on X: https://x.com/geoffreyhinton
- Amazon Mechanical Turk: https://www.mturk.com
- Why experts writing AI evals is creating the fastest-growing companies in history | Brendan Foody (CEO of Mercor): https://www.lennysnewsletter.com/p/experts-writing-ai-evals-brendan-foody
- Surge AI: https://surgehq.ai
- First interview with Scale AI’s CEO: $14B Meta deal, what’s working in enterprise AI, and what frontier labs are building next | Jason Droege: https://www.lennysnewsletter.com/p/first-interview-with-scale-ais-ceo-jason-droege
- Alexandr Wang on LinkedIn: https://www.linkedin.com/in/alexandrwang
- Even the ‘godmother of AI’ has no idea what AGI is: https://techcrunch.com/2024/10/03/even-the-godmother-of-ai-has-no-idea-what-agi-is
- AlexNet: https://en.wikipedia.org/wiki/AlexNet
- Demis Hassabis interview: https://deepmind.google/discover/the-podcast/demis-hassabis-the-interview
- Elon Musk on X: https://x.com/elonmusk
- Jensen Huang on LinkedIn: https://www.linkedin.com/in/jenhsunhuang
- Stanford Institute for Human-Centered AI: https://hai.stanford.edu
- Percy Liang on X: https://x.com/percyliang
- Christopher Manning on X: https://x.com/chrmanning
- With spatial intelligence, AI will understand the real world: https://www.ted.com/talks/fei_fei_li_with_spatial_intelligence_ai_will_understand_the_real_world
- Rosalind Franklin: https://en.wikipedia.org/wiki/Rosalind_Franklin
...References continued at: https://www.lennysnewsletter.com/p/the-godmother-of-ai _Production and marketing by https://penname.co/._ _For inquiries about sponsoring the podcast, email podcast@lennyrachitsky.com._ Lenny may be an investor in the companies discussed.
SPEAKERS
Lenny Rachitsky
hostDr. Fei-Fei Li
guestNarrator
other
EPISODE SUMMARY
In this episode of Lenny's Podcast, featuring Lenny Rachitsky and Dr. Fei-Fei Li, Dr. Fei-Fei Li: Why world models come next, not bigger LLMs explores Godmother of AI Fei-Fei Li bets big on world models Dr. Fei-Fei Li traces the evolution of AI from early machine learning and the "AI winter" through ImageNet and deep learning to today's large language models, emphasizing how data, neural networks, and GPUs enabled the current boom.
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