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Embedding

Definition A dense numerical vector representation of a word, sentence, image, or other data object that captures its semantic meaning in a high-dimensional space. Items with similar meanings have vectors that are close together by distance metrics like cosine similarity.

In Depth

Embeddings are generated by passing data through a neural network encoder and extracting an intermediate layer output. They are the bridge between raw data and downstream AI tasks: search, clustering, recommendation, and anomaly detection all operate on embeddings. Models like text-embedding-3 (OpenAI) and Gecko (Google) are purpose-built for producing high-quality text embeddings.

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