I generally just check the Price/Performance graph on Openrouter: https://openrouter.ai/rankings#performance#benchmarks. Activate the "Show Pareto" toggle on the right.
I was still using GLM-5.2 in my personal projects, but this just made Luna a very easy choice.
The official doc says, Luna = Previous Nano models, kind of. Is it really good at coding?
Hasn't OpenRouter had Luna and Terra on 50% off sale since they launched? I wonder what will happen to that.