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Browser Tennis Game for Decision Models

Vlad adapted a browser tennis game for Jev and Decision-Machine-1 to play against each other, with each model choosing tactics from a snapshot of the game state.

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Vlad@deifosv𝕏
Everyone is talking about Jev, but there’s a new kid in town: Decision-Machine-1. So far in my tests, it’s faster, cheaper on estimated API cost, and beating Jev at tennis. 🎾 I wanted to understand these decision-making models, so I made it fun. I adapted a browser tennis game and let them play against each other. Now I’m watching API calls turn into rallies and wondering why one player keeps rushing the net. The players are Jev from @typesafeai and Decision-Machine-1 from @millisecondsai Each model gets a snapshot of the game state and picks a tactic. It can choose the shot direction and dep
Sep 23, 2026X postsView on X
The game turns API calls into rallies. Vlad made it to explore how decision-making models behave.

Also filed under Games & real time