THE LIVE DECISION ARENA

Inside Jev.

Every choice. Every move. As it happens.

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Play against Jev ↗

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About Jev Model, creators & how it worksTypeSafe AI

Fast, structured decisions

Jev is TypeSafe’s first System One model. It takes text and structured game state and returns choices with confidence estimates. In Wreck Valley it selects a tactic and maneuver; our local driver handles steering, braking, drift and nitro.

Nightfall GT duels can use our separately trained neural driver for those inputs. Jev’s hosted weights remain unchanged. Training results and gameplay ↗

The arena shows observable game data and returned choices. Jev does not receive gameplay images or expose a reasoning transcript here. Its confidence is an estimate, not a guarantee of success.

Jev 1.13 on OpenRouter ↗How System One works ↗

Meet the creators

TypeSafe AI lists Diogo Almeida as co-founder and CEO, Sasha Sheng as co-founder and COO, and Erik Gafni as co-founder and CTO.

The company develops decision models using reinforcement learning for calibrated decisions. Our self-play driving policy is a separate Wreck Valley component; running this visualiser does not train the hosted Jev model or make additional model calls.

TypeSafe team ↗TypeSafe AI ↗

Model and team descriptions checked against TypeSafe and OpenRouter on 22 September 2026. Session costs above come from the game’s ledger.