Graph RAG When to Use Graph RAG vs Vector RAG | Signal | Graph RAG | Vector RAG | |---|---|---| | Multi-hop questions ("who reports to X's manager?") | Yes | No | | Entity-centric queries with fan-out | Yes | Partial | | Global/thematic questions over a corpus | GraphRAG community summaries | No | | Local "find me similar text" lookup | Overkill | Yes | | Structured relations already exist (SQL, CRM) | Strong fit | Weak | | Low-latency, high-QPS chat | Hybrid (graph for reasoning, vector for context) | Yes | Rule of thumb: use graph RAG when the answer requires connecting pieces of informatio…