Invoice Extraction: Node.js Semantic Search Plus an LLM Classifier Guide for 2026
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Short answer: use semantic search plus an LLM classifier to narrow invoice-field candidates, then produce a typed result only when the evidence clears an explicit gate. Keep the fast path small. A supplier invoice that takes 900 ms to tag is inconvenient; one that silently turns an invoice number into a purchase-order number is an operational incident waiting to happen. The numbers are policy choices, not universal benchmarks. Start with a 300 ms retrieval budget and an 800 ms end-to-end target