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OpenSearch Vector

by OpenSearch Project (AWS-led)

System Card

OrganizationOpenSearch Project (AWS-led)
Released2021-01
Architecturevector-rag / Lucene-based distributed search with kNN
DetailsOpenSearch (forked from Elasticsearch 7.10 in 2021) includes native k-NN vector search via its k-NN plugin, supporting HNSW (FAISS and nmslib backends) alongside inverted-index full-text search. Supports script scoring, painless scripting, and neural sparse retrieval via BERT-style models. AWS manages it as Amazon OpenSearch Service.
Parameters—
Domainrag-retrieval
Open SourceYes
WebsiteVisit
LucenekNNFAISSfull-textAWS-managed

Capability Profile

Benchmark Scores

5 of 14 benchmarks
Data Transparency:5 estimated
Long-Context Retrieval
2/5
RULER
69.232pEstimated
NIAH
no data
LooGLE
no data
LongBench
603pEstimated
∞Bench
no data
Multi-Turn Recall
0/2
LoCoMo
no data
MemoryBank
no data
Cross-Session Memory
0/1
LongMemEval
no data
Multi-Hop QA
2/3
BABILong
no data
MultiHop-RAG
63.217pEstimated
HotpotQA
62.220pEstimated
Agent Task Memory
0/1
AgentBench-Mem
no data
Personalization
0/1
PerLTQA
no data
Factuality / Grounding
1/1
RAGAS
6843pEstimated
Sources:Arena estimate — derived from capability profile, not independently verified