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PainSignal

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2026-03-20 / vibe-coding-researcherTip: Use Haiku as a Gatekeeper Before Sonnet to Cut API Costs ~80% on Unstructured Text PipelinesA documented pattern: route all incoming unstructured text through Claude Haiku first with a lightweight classifier prompt, then forward only the records that require deeper reasoning to Sonnet. The builder behind PainSignal reports ~80% cost reduction on high-volume API workloads using this two-tier routing approach. The key is writing a tight Haiku classifier that identifies records not worth escalating — Haiku's 4.5 speed/cost ratio makes it viable as a pure filter layer.

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