tiershift: policy-bounded LLM cost router

Jev scores each request on eleven dimensions (difficulty, stakes, safety and more) and YAML thresholds map the scores to model tiers; TypeScript and Python SDKs plus an HTTP proxy.

Notes

~180 ms routing decision; flagship quality at 40% lower cost on 120 prompts ($7.95 versus $13.23 per 1k), $0.04 per 1k routing overhead.

source-backed — Public repository, docs or live artifact. About this label

Destinations

Try a walkthrough

• Connect Jev to your app →

  Set up the Python SDK, make a typed routing decision and keep the result under your application's control.

• Route the next step of an agent →

  Let Jev choose a proposed next step, then apply an explicit allow, review or fallback policy before any tool runs.

Verification levels

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Filed under

• #routing
• #cost
• #github

In collections

• Agent harnesses →