Yann LeCun's $1B Bet Against LLMs [Part 2]

Huge thanks to KiwiCo for sponsoring today’s video! Go to https://www.kiwico.com/welchlabs and use code WELCHLABS for 50% off your first monthly crate or for 20% off your first Panda Crate! Welch Labs Book: https://www.welchlabs.com/resources/ai-book-ezrzm-msrmc JEPA Poster: https://www.welchlabs.com/store/subliminal-learning-poster-17x22-xkfa2-7m2hh Patreon: https://www.patreon.com/c/welchlabs Part 1: https://www.youtube.com/watch?v=kYkIdXwW2AE Sections 0:00 - Intro 2:30 - V-JEPA 8:18 - VL-JEPA 14:05 - But what about VLA? 15:13 - My kids love KiwiCo 17:14 - LeCun’s critique of VLA 22:42 - LeWorldModel 30:41 - Hierarchical JEPA 34:55 - My Take 35:57 - The Future of JEPA 38:57 - JEPA Poster & Patreon Update Special thanks to: Yann LeCun, Chen Delong, Lucas Maes, Mustafa Shukor, Wancong Zhang, Alison Young, and Theo Moutakanni Big thank you for Yann’s collaborator Randall Balestriero for discussing JEPA at length with me, Randall’s his recommended reading: - LeJEPA for more theory on why isotropic Gaussian and details on SIGReg: https://arxiv.org/abs/2511.08544 - connection between SSL and spectral embedding (very useful to understand the geometry learned by those models): https://arxiv.org/abs/2205.11508 - LeWorldModel (world model version of LeJEPA): https://arxiv.org/abs/2603.19312 - identifiability theory of LeWorldModel (fresh out of the oven): https://arxiv.org/abs/2605.26379 - and perhaps most important of all, the reason why one should use JEPA and not reconstruction based learning: https://arxiv.org/abs/2402.11337 and https://arxiv.org/abs/2505.12477 Thanks to Ayzaan Wahid for permission to use clips from:  https://www.youtube.com/watch?v=PHXQFE-Rteo Aloha Controller video: https://www.youtube.com/watch?v=VUxFhtGWD7w Under proper reference to “by Zipeng Fu at Stanford University”, permission given. Pi07: https://www.pi.website/blog/pi07 V-JEPA 2: https://arxiv.org/pdf/2506.09985 VL-JEPA: https://arxiv.org/pdf/2512.10942 LeWorldModel: https://arxiv.org/pdf/2603.19312 Hierarchical World Models: https://arxiv.org/pdf/2604.03208 Image Credits: https://commons.wikimedia.org/wiki/File:Omphalotus_olearius_Mallorca.jpg Stock videos & Images Adobe Stock: 256573141, 307085467, 240682884 Technical note about VL-JEPA embeddings. The VL-JEPA team used a SONAR decoder/encoder, which works at the sentence level instead of the token level for the controlled VLM/JEPA comparisons. PATRONS Juan Benet, Ross Hanson, Yan Babitski, AJ Englehardt, Alvin Khaled, Eduardo Barraza, Hitoshi Yamauchi, Jaewon Jung, Mrgoodlight, Shinichi Hayashi, Sid Sarasvati, Dominic Beaumont, Shannon Prater, Ubiquity Ventures, Matias Forti, Brian Henry, Tim Palade, Petar Vecutin, Nicolas baumann, Jason Singh, Robert Riley, vornska, Barry Silverman, Jake Ehrlich, Mitch Jacobs, Lauren Steely, Jeff Eastman, Rodolfo Ibarra, Clark Barrus, Rob Napier, Andrew White, Richard B Johnston, abhiteja mandava, Burt Humburg, Kevin Mitchell, Daniel Sanchez, Ferdie Wang, Tripp Hill, Richard Harbaugh Jr, Prasad Raje, Kalle Aaltonen, Midori Switch Hound, Zach Wilson, Chris Seltzer, Ven Popov, Hunter Nelson, Amit Bueno, Scott Olsen, Johan Rimez, Shehryar Saroya, Tyler Christensen, Beckett Madden-Woods, Darrell Thomas, Javier Soto, U007D, Caleb Begly, Rick Rubenstein, Brent Hunsaker, Dan Patterson, Tchsurvives, Alex Adai, Walter Reade, Zyansheep, Walter Reade, Duncan Stannett, Reginald Carey, Jean-Manuel Izaret, dh71633, Adrian Rodriguez, Dimitar Stojanovski, Michael Harder, Peter Maldonado, Emily Pesce, David Johnston, Insang Song, FaeTheWolf, Stephen Taylor, KittenKaboodle, EMatter, PATRICKMCCORMACK, John Beahan, Cameron, Cole Jones, Garrett Thornburg, Jeroen W, Rohit Sharma, GlennB, Emmanuel Cortes, Katie Quinn, Karina C, Cakra WW, Mike Ton, Eric Gometz, MacCallister Higgins, Niko Drossos, David Eraso, Tom Zehle, Steve, Brian Lineburg, rjbl, Michael Loh, Perry Vais, Bengal0, Farhad Manjoo, Sara Chipps, Ellis Driscoll, William Taysom, Will Harmon, CK, Abdullah, Peter Cho, Leo Nikora, Griffin Smith, Ash Katnoria, Alex, Markus Hays Nielsen, Catherine H., Vi, David Dobáš, Peter Wang, Sina Sohangir, Danny Thomas, Julian Francis, Hans Adler, Jiayu Peng, Weston M, Youssouf da Silva, John Thomas, Samuel Costello, Sam Adams, Bryan Liles, Malaya Zemlya, Karl, Vahe Andonians, Mike Doughty, Larry Novelo, Jonas Acres, Ludicrum Rex, Robert Blumofe, Anthony Z, Alex Zhao, Dan Babitch, Nikko Patten, Sam Adams, Rahul Ravu, Marco Salvi, Ralph Dratman, Brendan Ardagh, Mindaugas Kazlauskas Supporting code: https://github.com/WelchLabs/videos Created by: Matthew Cohen, Sam Baskin, Pranav Gundu, Varun Reddy, and Stephen Welch Content ID: CFAQJOTYQHT7JYIT