Open-source PageIndex ditches vectors for tree-search RAG, scores 98.7% on FinanceBench vs GPT-4o's 31%

aakashgupta · x · 2026-11-05

Aakash Gupta covers PageIndex, an open-source 'vectorless RAG' that builds a hierarchical tree index instead of chunking/embedding, with an agent navigating it like tree search. It scored 98.7% on FinanceBench vs 31% for GPT-4o with search, and returns exact page/section citations for full traceability.

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Open-source PageIndex ditches vectors for tree-search RAG, scores 98.7% on FinanceBench vs GPT-4o's 31%

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