P Moth-Retrieval: Graph-Free Multi-Hop Retrieval via Query-Time Orchestration (Beating Graph-Based Systems on HotpotQA) [P]

We just open-sourced MOTHRAG, a multi-hop RAG framework that skips the knowledge graph entirely. We kept hitting the same wall building multi-hop RAG: the systems with the best accuracy (GraphRAG, HippoRAG, RAPTOR) all lean on a knowledge graph built offline, and that’s great numbers, until the moment your data changes! Every single update means re-running a heavy LLM indexing pass to rebuild the graph. If your corpus updates daily (prices, internal filings, support tickets, news), you're paying a constant, brutal re-indexing bill. MOTHRAG uses a graph-free dense index with query-time orchestr