I had my first use case recently, and did some very non-systematic benchmarking of models on OpenRouter.

The only one that came close to Jev itself was the one from respan (respan/span-02), which is also open source and cheaper too.

Have you checked mammoth-1/elephant-1 models? They are benchmarking quite well compared and are currently free on openrouter. I currently use mammoth-1 for a small internal app and it works flawlessly for what I am doing.

https://huggingface.co/baselabs/mammoth-1