It will be

Our announcement is here:
cornball.ai/posts/introd...

🎨 Excited to release diffuseR
- an R implementation of the diffusers library!
✨ txt2img and img2img generation
🚀 No Python dependencies
📦 SDXL & SD2.1 models. More coming soon!
What will you create? #RStats #AI

Same. Claude 4 has been solid too so far.
This warning from the Shiny Assistant back in October was a good indicator this was the case.
I suspect/hope they’ll extend Rstudio’s GitHub copilot integration to work with Claude soon.