Vote: what runs first

The machine arrives in late October. Delivery week is one box and a queue, and the front of that queue is yours to decide.

Each option answers a different question, and every one of them is a question we could not find a published answer to for a single 512 GB Mac. The winner is benchmarked first, in full, and its raw JSON is published free. The rest follow in vote order.

Pick one Kimi K2.6, 2-bit 345 GB
Does a trillion parameters at 2-bit beat 400B at 4-bit? Nobody has published this comparison on one machine. Qwen3.5-397B-A17B, 4-bit 224 GB
The comfortable case: a big MoE with room left for 128K of context and a second model resident. GLM-5.2, 4-bit 467 GB
The ceiling. The largest 4-bit build that fits at all, with almost nothing left for the KV cache. DeepSeek-V4-Flash, Q4/Q8 173 GB
The likely daily driver, and a 1M-context claim we can find the real edge of. gpt-oss-120b, MXFP4 63 GB
The speed ceiling, and the Neural Accelerator test: does prefill really double on M5? Llama 4 Maverick, 4-bit 245 GB
The best-documented M3 Ultra baseline, so the generational delta reads clean.

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Where it stands

No votes yet. The first one decides the queue until the second one arrives.

Why these six and not others: what actually fits in 512 GB. How they will be measured: the method.