From what I can gather Grok is not used for roleplay much. It is considered to inconsistant and crazy.

People are mostly using GLM and Deepseek via API and Gemma4 and Mistral finetunes locally.

It seems to me like the roleplay market is comparatively old and mature and users have developed cost consciousness and like models to follow their workflow/preferences. So something like Opus is liked for its smartness but considered too expensive and opinionated.

Might be an interesting data point for how the other markets might develop in the future.