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Activation Reconstruction on Wikipedia activations Llama-3.1-8B

0.004MSEMFA
0.000720.022860.0450.06714Feb 2, 2026

Evaluation results

MethodLinks
MFALayer=8, Number of Features (K)=8K2026.020.004—
MFALayer=8, Number of Features (K)=32K2026.020.004—
MFALayer=8, Number of Features (K)=1K2026.020.005—
K-MeansLayer=8, Number of Features (K)=32K2026.020.005140
K-MeansLayer=8, Number of Features (K)=8K2026.020.006140
K-MeansLayer=8, Number of Features (K)=1K2026.020.007130
SAELayer=8, Number of Features (K)=131K2026.020.023—
SAELayer=22, Number of Features (K)=131K2026.020.038—
MFALayer=22, Number of Features (K)=32K2026.020.045—
MFALayer=22, Number of Features (K)=8K2026.020.051—
MFALayer=22, Number of Features (K)=1K2026.020.064—
K-MeansLayer=22, Number of Features (K)=32K2026.020.066150
K-MeansLayer=22, Number of Features (K)=8K2026.020.074150
K-MeansLayer=22, Number of Features (K)=1K2026.020.086130