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Alexei A. Efros

UC Berkeley

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#artificial intelligence Preprint Oct 2026

Correction Training for Diffusion Models

The method substantially improves upon previously reported FID scores for unguided generation and, notably, unconditional generation, where producing high-quality samples without guidance has been particularly challenging.

Donghoon Ahn, Run-Qian Wang, Alexei A. Efros et al. · 0 citations
#artificial intelligence Preprint Oct 2026

Base Models Can Reason By Taking a Cue From Training Data

In this paper, we study how training data creates associations between the tokens at the start of a base model's response and the reasoning behavior that follows. First, we demonstrate that fixing particular starting token cues makes a base model's performance competitive with that of its reinforcement learning (RL)-tr...

Sophie L. Wang, Amil Dravid, Rulin Shao et al. · 0 citations
Preprint Sep 2026

Bottom-up Modeling of Repeated Elements via Single Image Analysis-by-Synthesis

Qualitative results reveal superior reconstructions and interpretable decompositions compared to classical decomposition, joint alignment, and 3D object modeling methods, while maintaining a simple 2D formulation, suggesting that meaningful object discovery can emerge from single image learning alone.

Syrine Kalleli, Alexei A. Efros, Mathieu Aubry · 0 citations

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