Machine Learning Street Talk (MLST)

VAEs Are Energy-Based Models? [Dr. Jeff Beck]

207 snips
Jan 25, 2026
Dr. Jeff Beck, a researcher in ML and computational neuroscience, explores agency, energy-based models, and the foundations of intelligence. He discusses whether planning can be distinguished from complex policies, how VAEs act as energy-based models by optimizing latents, the JEPA approach to learning in latent space, and risks like human enfeeblement from over-reliance on AI.
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INSIGHT

Energy Models Optimize Internal States Too

  • Energy-based models apply cost to internal states as well as weights, forcing nested minimizations.
  • VAEs exemplify this by regularizing latent representations alongside input-output reconstruction.
ADVICE

Train For Test-Time Adaptation

  • Don't enable test-time latent adaptation unless the model was trained with that mode active.
  • Training without those latents can make test-time optimization brittle or unwise.
INSIGHT

EBMs Connect To Bayesian MAP

  • Energy in physics corresponds to negative log probability, linking EBMs to Bayesian MAP estimation.
  • EBMs often perform MAP on latents while Bayesian methods keep full posterior uncertainty.
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