Cost-Effective Pipeline: Cheap Model Drafts + Frontier Model Final Pass
Visual-Basis3400 · reddit · 2026-07-23
The author shares a two-tier routing architecture to optimize cost and quality in high-volume document generation pipelines.
Workflow:
- Cheap Model for Drafting: Expands structured outlines into prose per section. This is the high-token, low-judgment part where a smaller model suffices.
- Frontier Model for Final Pass: Performs a single pass on the assembled draft to tighten the top line, catch cross-section contradictions, and run a faithfulness check. This is the low-token, high-judgment part.
Effects & Limitations:
This approach routes the majority of tokens to the cheap tier, substantially reducing costs while maintaining quality and improving latency via parallelization. However, limitations exist: subtle factual errors from the cheap model might bypass the final review; maintaining two prompt surfaces increases overhead; and the routing threshold is currently a hand-tuned guess rather than a learned decision.
More from coding & agent
- ThoughtSpot launches SpotterCode, a hosted MCP server letting Claude Code query live instances — thoughtspotdev · 2026-10-26
- Non-developer stuck at 65% with Claude Code: rules files and CLAUDE.md weren't enough — jinguh · 2026-10-26
- HermesOBD: open-source macOS app pipes live car OBD-II data to a local Hermes agent — Teknium · 2026-10-26
- User Claims Codex Autonomously Reverse-Engineered Serum2 and Stripped Its License — Kyrannio · 2026-10-26
- colab-mcp lets AI agents control Google Colab notebooks directly — helloiamleonie · 2026-10-26
- Postiz, an open-source AI-agent social media manager, hits 37.9k GitHub stars — abhishek__AI · 2026-10-26