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Weaviate cuts a 1.40.0 release candidate with Namespaces GA and 4-bit rotational quantization
v1.40.0-rc.0, published 2026-09-15, is declared feature complete with Namespaces reaching GA, dropping a vector index via Alter Schema reaching GA, HFresh MUVERA, and 4-bit Rotational Quantization. Weaviate simultaneously shipped patch releases on three older lines the same day (1.39.5, 1.38.15, 1.37.17); 1.38.15 notably backports node-level query admission control (#12078) and a fix that drops class data the schema no longer names. The 4-bit RQ line is the one to watch for anyone sizing a vector index against memory rather than recall.
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