Got temporary access to a Mac Studio M5 Ultra. Barely optimized, Qwen 3.8 Flash Next runs at 85.9 tok/s and 6085 tok/s prefill on long prompts.
A 2x DGX Spark recipe gets 52.1 tok/s single stream and about 2960 tok/s prefill on 16k–64k prompts.
Already ahead of 2x Spark, but I was expecting a much much better baseline…