// Link · 28 February 2026

How Microsoft Trained a 270M-Pair AI to Power Smarter Search

Researchers at Microsoft Corporation introduce E5, a powerful text embedding model trained on 270M curated web text pairs (CCPairs). Using contrastive learning with in-batch negatives, E5 becomes the first unsupervised model to outperform BM25 on the BEIR benchmark. After fine-tuning, it tops the MT...

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