Rescored binary vector search in Neo4j: search more with less memory

As an AI application grows, its embeddings can quickly become one of its largest demands on memory. More documents, finer-grained chunks and richer embedding models all increase the amount of vector data your database needs to search. Keeping retrieval fast as that collection grows can mean paying for substantially more RAM. Rescored binary quantization changes that balance. It dramatically reduces the memory footprint while maintaining retrieval speed and accuracy over a far greater range. Rescored binary quantization changes that balance. It dramatically reduces the memory footprint while maintaining retrieval speed and accuracy over a far greater range. In our benchmarks, Neo4j 2026.09 delivers approximately both five times better throughput and also query latency than Neo4j 2026.08. An upcoming benchmarking post will explain the methodology and results. In Neo4j 2026.09 Aura, EE…