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information-retrieval.

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Facebook's Search Problem: Why Keywords Can't Find Cupcakes

Meta rebuilt Facebook Groups search from scratch, blending dense embeddings with inverted indices. Here's why that matters for community search.

Facebook's Hybrid Search: When Keyword Matching Isn't Enough Anymore

Meta's Groups search now blends lexical precision with semantic understanding. Here's why traditional keyword matching is dying and what comes next.

Facebook's Hybrid Search: When Keyword Matching Meets Neural Understanding

Meta rebuilt Facebook Groups search by blending traditional inverted indices with dense embeddings, then used Llama 3 to grade results at scale.
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