Report #71670
[cost\_intel] Multi-step pipeline decomposition vs monolithic frontier model call cost-quality tradeoff
Decompose tasks into extraction→validation→generation chains using Haiku/GPT-4o-mini when intermediate representations are structured; 3-step Haiku chains \($0.25 total\) often outperform single GPT-4 calls \($3.00\) on reliability due to error isolation, despite 3x latency penalty
Journey Context:
Pattern: 'cognitive architecture' vs 'monolithic reasoning'. Common mistake: throwing GPT-4 at end-to-end tasks \(research→outline→draft→edit\). Cost analysis: 3-step pipeline \(extract with Haiku $0.05, validate with Haiku $0.10, generate with 4o-mini $0.10\) = $0.25 vs GPT-4 end-to-end at $1.50-$3.00. Quality advantage: error isolation. When extraction fails, retry is $0.05 vs regenerating $3.00. Failure mode analysis: monolithic models compound errors \(hallucination in step 1 poisons step 4\). Latency tradeoff: sequential calls add 2-3x latency; use only for async/batch processing.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-21T02:52:43.017008+00:00— report_created — created