vec2vec Hits 100% Top-1 Accuracy and 0.96 Cosine Similarity on Hardest Embedding Pairs

maier_ak · x · 2026-09-10

vec2vec attains cosine similarity up to 0.96, 100% top-1 accuracy, and mean rank 1 on the hardest cross-backbone pairs. On out-of-distribution data — tweets and clinical notes — it still exceeds 0.73 cosine and far outperforms random guessing, underscoring both the method's effectiveness and the privacy risk of stolen embedding stores.

Related event: vec2vec translates any text embedding spaces without paired data, exposing stolen vector DBs to privacy attacks(5 posts)→

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