Jev and OpenRouter
OpenRouter is a gateway that forwards your prompt to whichever LLM you name. Jev is a different layer: a typed decision model that picks one option and returns it with calibrated confidence. They solve different problems — and Jev is a great way to decide which OpenRouter model to call.
If you came here asking whether Jev is 'on OpenRouter', the useful answer is that Jev isn't just another chat model to proxy — it's TypeSafe AI's System One decision model with its own hosted endpoint. You call it directly for a typed answer: one of your options, a probability for each, and a confidence value, in roughly 70–500ms for about $0.001.
Jev vs OpenRouter
| OpenRouter | Jev | |
|---|---|---|
| What it is | LLM gateway / router | Typed decision model |
| Output | Whatever the chosen LLM returns | One typed option + confidence |
| Use it for | Sending prompts to many models | Deciding, classifying, judging |
| Latency | The model's latency | ~70–500ms |
| Cost | The model's price | ~$0.001 per decision |
Use Jev to route across OpenRouter
The two compose. Put Jev in front of your OpenRouter call as the router's brain: define your candidate models as options, send the request as state, and Jev returns the one to use plus a confidence score. Cheap, fast, calibrated model selection — then OpenRouter forwards the actual prompt to the model Jev picked.
- Define OpenRouter models as the choice options
- Jev returns one model + calibrated confidence in ~70–500ms
- Route cheap traffic to small models, escalate only when it matters
- Pin a Jev model version so your routing thresholds stay stable
Call Jev
POST https://jevtypesafeai.com/api/v1/decide with a jv_live_ key (official upstream POST https://api.typesafe.ai/v1/systemone). The Model Router tool shows this pattern running live.
See also: Model Router (live) · Jev vs an LLM · Jev for AI agents
Route smarter with Jev
Grab a jv_live_ key and pick the right model in one typed, calibrated call.