Build your own Jev-style decision model: 200x faster, 400x cheaper without switching models
Arindam_1729 · x · 2026-10-20
A guide to building a Jev-like decision model harness. Jev launched from stealth on Sep 15 and developers quickly routed real traffic through it; within two weeks OpenAI and AWS shipped their own decision models.
Key claims:
- The bottleneck is often the harness around the model: task routing, tool use, context management, and deciding what deserves a full LLM call
- Promises up to 200x faster and 400x cheaper — without a better model
How to try it: drop the PDF and companion article into Claude Code or Codex and ask it to rebuild its own harness per the guide. One evening of setup could seriously upgrade your coding agent: same model, smarter harness, less waiting, lower bills.
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