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Sitan Chen

@sitanch

assistant professor of computer science @hseas, learning theorist, 🎹
sitanchen.com Joined April 2020
220 Following 2.2K Followers 229 Posts

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Sitan Chen @sitanch
🚨 We finally have a better understanding of how the different paradigms for discrete diffusion compare!

In new work with Liye Wang, we prove a quadratic separation between the parallel generation capabilities of uniform and Gaussian diffusion relative to unmasking! 1/
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Sitan Chen @sitanch
It’s been great to see so much interest in Priming Models! Check out this new thread by Jaeyeon sharing new experiments that address some of the insightful questions we’ve gotten since the release
Jaeyeon (Jay) Kim Verified account @Jaeyeon_Kim_0 6d
Since releasing Priming Models, we’ve received great questions. Here’s a short follow-up with new experiments and release updates!

TL;DR: Diffusion policy setup / (# real samples) vs. Final FID / T2i checkpoints released / new blog post from @moritz_piening!
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Sitan Chen @sitanch
We figured out a much simpler method for training one-step generative models from scratch! Advances Pareto frontier for quality v FLOPs and strips out the engineering bells and whistles that made these so finnicky to train. Check out our codebase and try them out for yourself!
Jaeyeon (Jay) Kim Verified account @Jaeyeon_Kim_0 Oct 15
Today, we introduce Priming Models, a new paradigm for training one-step generative models from scratch.

No diffusion teacher. No flow map. No CFG. No JVP.

We believe this work will challenge how we think about building one-step models.

Joint work with @sitanch, @du_yilun, @parkwbin03, Bohyung Han.

🔥 1.19 FID one-step on ImageNet 256×256 while using substantially less compute, e.g., 12X less than Drifting-B, 6X less than Drifting-L
🎨 Scales to text-to-image generation (GenEval 0.82)
🤖 World modeling on RT-1 / Bridge-V2

Priming Model is built on one core message: [Reconstruction pretraining --> Distributional post-training].
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Sitan Chen @sitanch
Collaborating with Raghu and seeing his courage tackling truly hard problems (including one which has yet to be felled by the agents..) was a formative experience from my grad school years. A beautiful essay filled with hope in crazy times!
Pravesh K. Kothari Verified account @praveshkkothari Oct 7
From my friend and guide for a long time, a timely essay: terrytao.wordpress.com/2026/10/07/the…
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