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Jev

Fast, cheap yes/no, choice and score decisions for agents.

Jev preview

About

Jev is TypeSafe AI's "System One" model. It doesn't write text. It returns typed decisions (yes/no, pick one, score) with a probability for each option. Agents use it to route, gate risky actions, rank options or grade content at a fraction of an LLM's cost and latency.

Features

  • Typed outputs: yes/no, choice, score, with calibrated probabilities
  • Many questions answered in parallel in one call
  • Pay per input token; output is free
  • MCP server for Claude Code, Codex and Cursor
  • Also on Vercel AI Gateway and OpenRouter

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