I just tried with llama.cpp RTX4090 (24GB) GGUF unsloth quant UD_Q4_K_XL
You can probably run them all. G4 31B runs at ~5tok/s , G4 26B A4B runs at ~150 tok/s.

You can run Q3.5-35B-A3B at ~100 tok/s.

I tried G4 26B A4B as a drop-in replacement of Q3.5-35B-A3B for some custom agents and G4 doesn't respect the prompt rules at all. (I added <|think|> in the system prompt as described (but have not spend time checking if the reasoning was effectively on). I'll need to investigate further but it doesn't seem promising.

I also tried G4 26B A4B with images in the webui, and it works quite well.

I have not yet tried the smaller models with audio.