Not worth it for 512GB.
Better off using Claude and OpenAI models.
Local LLM isn't a compelling reason to get these Mac Studios with 512GB.
Just get 64GB - 128GB. Use a model that fits on those machines so your tokens per second are actually useful.
This is so tempting, and the delivery dates are not bad, but I have lately been felling much less bullish on this particular model.
512GB on the surface sounds great, but presumably you'd be wanting to run some of the largest available models on it.
This is problematic for me because as good as the memory bandwidth now is on these, running higher active parameter models on this device is probably going to be painfully slow.
I think the mac is much more suited to run models like Qwen 3.8 Next (which has 6B active params) or maybe GLM 5.3 Flash (18b params), which you dont need 512GB for.
The extra memory is useful, but its usefulness does not scale linearly with price, and so I'm just not sure.
Perhaps with some mixed compute solution (DGX Sparks for prefill/computation and M5U for decode) you could have the best of both worlds.
I just dont think I can live with <60toks/s, and certainly not 20.