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Author

Sarah Wilson

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#small language model Preprint Oct 2026

Readout Scaling Shapes Sparse Feature Recovery

Together, these results show how readout scaling, the data distribution, and training shape sparse learning, and RC-DS provides an information-preserving method for studying and controlling the readout's contribution.

Brian Xiao, Sarah Wilson · 0 citations
#artificial intelligence Preprint Oct 2026

Readout Scaling Shapes Sparse Feature Recovery

Readout scaling changes what a sparse autoencoder (SAE) learns, but the benefit of removing it depends on the data. We use readout-canonicalized decision-space (RC-DS) coordinates to remove singular-value gains while preserving retained decision information. At a fixed readout condition number, changing the generating...

Brain Xiao, Sarah Wilson · 0 citations
#artificial intelligence Preprint Sep 2026

Efficiency Hallucination: Formalizing and Measuring Behavioral Calibration in LLM-Based Code Optimization

The integration of Large Language Models (LLMs) into automated code optimization introduces a critical reliability risk we term the Efficiency Hallucination: an LLM's tendency to issue non-functional mutations with unsubstantiated performance claims on already-optimized code. This is driven by the Evaluation Trap, wher...

Sarah Wilson, Gail E. Kaiser, Patrick Musau · 0 citations

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