I did some testing with the flash and pro 2.5 model, 2 or 3 months ago, which in the AI universe is a century ago. It was a lil worse imo.
The flash version is really cheap and very fast, which imo is really an option if you don't mind the slightly worse translation.
Apparently the gemini pro 2.5 06-05 version is a lot better for translation ,but it's still waaay too pricy, so haven't even tried it, and my €300 free credits have expired. There's no flash version yet afaik, which will should be a lot cheaper.
As I also do like 70% of my translations on chinese sources (30% Japanese transcriptions), gonna be hard to beat deepseek as well. As I assume it's more trained on Chinese.