Why Deterministic Rules Beat LLM-Generated Quotes
LLM-powered chatbots can do many things well, but pricing isn't one of them. GPT-4 hallucination rates run 3–10% depending on domain — and for pricing, even 1% error is unacceptable. A roofer's pricing depends on square footage, pitch, material grade, number of layers to remove, chimney count, and local permit costs. An LLM will "estimate" a price based on training data patterns — not your actual rules. The Quoting Agent uses deterministic logic: your exact pricing rules, tiers, modifiers, and exceptions are codified into a rules engine. The output is mathematically identical every time the same inputs are provided — computed in under 100ms vs. 2–10 seconds for LLM inference. Gartner reports manual quoting error rates of 12–25%, causing 40% more post-signature revisions (Aberdeen Group). Salesforce CPQ data shows organizations using rules-based quoting achieve 2x higher quote-to-close rates. No hallucination. No variation. No risk of quoting $5,000 for a $15,000 job.



