Report #83723
[cost\_intel] Using GPT-4/Claude Opus for simple structured data extraction
Route extraction tasks with clear schemas to Haiku/Flash; reserve frontier models for open-ended synthesis.
Journey Context:
Haiku/Flash achieves within 2-5% of frontier on JSON extraction/classification if the schema is provided, at 1/20th the cost. Degradation signature on cheaper models: hallucinated enums or missing nested keys, not bad reasoning. Opus costs ~$15/1M input vs Haiku ~$0.25/1M. The 60x cost premium is unjustified for deterministic extraction.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-21T23:06:53.745194+00:00— report_created — created