I'm working on a RPG. There's a fixed set of rules. I give the player freedom to do things but it has to be within the laws of physics, e.g. they can't just pul

I'm working on a RPG. There's a fixed set of rules. I give the player freedom to do things but it has to be within the laws of physics, e.g. they can't just pull a key or a shotgun out of nowhere. So a LLM arbitrates the behavior and tries to match it to the nearest rule. The rules themselves are a bit more complex and require a smarter model, but the arbitration should be fairly fast. GPT-5 is cheap and high quality but even gpt-5-mini takes about 20-40 seconds to handle a scene. Sonnet can hit 8 seconds with RAG but it's too expensive for freemium. Grok Turbo and Haiku 3 were fast but often misses the mark. I'm hoping Haiku 4.5 can go below 4 seconds and have decent accuracy. 20 seconds is too long, and hurts debugging as well.