OpenRouter introduces Jev Router, a new model-routing approach with major agent benchmark gains

Key Info

OpenRouter announced Jev Router, a new model-routing approach powered by TypeSafe's first Decision/System One model, which solved 82% more tasks than its Auto Router on four agent benchmarks (237 vs 130 of 423) and achieved faster median time-to-first-token than tested alternatives on five benchmarks.

Highlights

• On four agent benchmarks, Jev Router solved 82% more tasks than Auto Router (237 vs 130 of 423).
• On five agent benchmarks, Jev Router had faster median time-to-first-token than all other routers tested.
• Unlike typical routers, Jev Router keeps a model for the whole session to avoid losing cached chat, and routes based on task difficulty rather than just task type.
• Jev scores each prompt on difficulty and precision, deciding whether a bigger model, more effort, or a cheaper model is needed, and whether the task changed.
• Runs under zero data retention (ZDR) terms; attachments are never sent to Jev, and requests with 'zdr: true' work with Jev Router.