The document-classification benchmark everyone reports 98.8 percent on has 10.5 percent bad labels and a third of its test set duplicated in training
AspireAI community · arXiv
An audit of RVL-CDIP, the de facto standard benchmark for document classification, found that roughly 10.5 percent of its 400,000 documents carry erroneous labels and that 35.2 percent of the test set has a duplicate or near-duplicate in the training set, which puts the widely reported 98.8 percent accuracy in doubt. Identification codes printed on the pages are enough to classify at 69 percent accuracy, and a state-of-the-art model loses 11 points when they are removed. Image-only models trained on it lose 16 to 28 points on documents from other sources, and swapping the OCR engine moves accuracy by 4.1 to 8.3 points. The audit also found nearly 16,000 documents containing sensitive personal data and produced de-identified versions. With every defect remediated, the 13 re-trained models land 0.9 to 2.9 points above their original scores, with LayoutLMv3 the most accurate at 96.5 percent. The corrected corpus, annotations and out-of-distribution data are released.
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Two sparse-autoencoder analyses have resisted scaling: matching semantically similar features across layers, and compressing large feature circuits into interpretable supernodes. This paper argues both are the same underlying problem, estimating semantic distances between SAE features that sit on different activation manifolds. Its representation treats each feature not as a single decoder vector but as an activation-weighted distribution over the hidden states expressing it, projects those distributions into a shared reference space, and compares them with Wasserstein distance. The representation is proved invariant to activation rescaling and stable under perturbation, and recovers true matches under finite-sample margin conditions. Empirically it outperformed decoder-vector and LLM-based baselines and captured subtle functional distinctions between related features, and it compressed large feature circuits into interpretable supernodes automatically. The limitation is that this is interpretability tooling: the paper demonstrates better feature matching and circuit compression, not that downstream interpretability claims become more accurate.