The part about "tool-calling on other models didn't solve already" is what gets you, sure I could tool call deepseek, glm or any other model, but the latency is huge and you get no confidence score. I gave JEV a shot via OpenRouter and it has a reply in less than 400ms, it's fast enough and cheap enough that you can hook it up to a game loop for example (so highly state dependant) and it can do decisions in real time.