Francois Chaubard

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744 appearances 1 recordings 1 series first heard Jul 2026 last heard 17 Jul

Francois Chaubard’s voice in public audio — every appearance, attributed to the second.

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Recordings per month over the last 12 months — 1 in all, peaking in Jul 2026 with 1.

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Y Combinator Startup Podcast · World Models, Explained · 17 Jul 2026 podcast

We have to make sure we cite him.

but he has this really cool paper called world models, very aptly named.

And it's basically, he took these like open AI gym, classic games, car racing, and I think doom as well.

And then just like trained a model at that time was like an RNN.

He had some funky zero order stuff in there or whatever.

But basically the key premise was I can take an environment.

I can extract a whole bunch of,

this type of data off of it.

I think he actually does actually this data, but we'll get into Dreamer where he does it in this way.

And then trains a policy on only the synthetic data, the imaginated rollouts.

And it actually performs well in the environment.

This is the first time in my understanding that that actually happened and it actually works really well.

Exactly.

And which is just like a really powerful idea, especially since in robotics, the limiting step is access to large amounts of state action data.

And so now the Dreamer series, so basically this publish publishes in May of 2018, uh, Danijar, uh, Hafner, uh,

He publishes Dreamer 1, I think, in November of 2018.

And then now he's been on this rampage for the last seven years publishing these papers.

And Dreamer V4, I think, is the capstone of it, where he basically does the same thing.

And he focuses on Minecraft.

And he trains a world model on this type of data.

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