Jev in production › Model and agent routing

jev-router (FrancoisChastel)

Jev judges which coding-agent turns the cheapest model can finish, routing each turn and logging cost against always-cheap and always-frontier baselines.

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The source publishes no measured number.
Use
Model and agent routing
Industry
Developer tools
Form
Open-source tool
Stage
Beta
Listed
2026-09-29
Found via
github
Repository
FrancoisChastel/jev-router
Stars
5
Forks
0
Last push
2026-09-30
Language
TypeScript
License
MIT

The README opens with

Route every turn of your coding agent to the cheapest model that can finish it.

jev-router sits between Claude Code, Codex, OpenCode, or Pi and your model gateway. It watches how the agent is doing, asks TypeSafe's jev a few typed questions when the situation is unclear, and picks a model and reasoning effort per turn. It logs every decision with what it would have cost on every other model, so you can see whether routing pays before you trust it.

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For the project's own README, linking back here:

Listed in Jev in production

Also used for model and agent routing