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256 GB Mac class · Mac Studio M5 Ultra 256 GB

What to run on 256 GB Mac

One Mac Studio. CPU and GPU share the 256 GB of memory. 2 complete runs on Mac Studio M5 Ultra 256 GB. Click any number for the raw output. Click a column to sort.

1× Mac StudioLast measured Oct 20, 2026
My pick for 256 GB Mac new

Qwen3.8-Flash-Next

Mac Studio M5 Ultra · oQ4e-mtp, oMLX 0.7.0, MTP depth 3

It has the highest overall score in this class: 87.3 of 100, as of 20 Oct 2026, rank 1 of 2. The agent test: it built the voxel world in 58.1 minutes. The browser check gave the page 8.5 of 10; I rate it 4 of 10.

87.3/ 100 overall, as of 20 Oct 2026
8.5/ 10 agent test
4/ 10 my rating
152.5tok/s
≈ 5.4 sfor 500 words
How to run it →
Results

2 complete runs

#Creator Setup Overallof 100 Agent testbrowser check Speedtok/s Qualitymean of 7 tests Memorylargest context
1oMLX (Jun Kim)Qwen3.8-Flash-NextnewMac Studio M5 Ultra87.3 of 100rank 1 of 2as of 20 Oct 2026Page built in the agent test8.5 / 10152.5≈ 5.4 s for 500 wordscode 175.8 · prose 129.164.8%mean of 7 tests256Ktokens tested
2gnahzhangDeepSeek-V4.1-Flash-1017new1× Mac Studio M5 Ultra64.6 of 100rank 2 of 2as of 20 Oct 2026Page built in the agent test8 / 1063.8≈ 11.2 s for 500 wordscode 67.7 · prose 60.060.0%mean of 7 tests128Ktokens tested

Creator: who made the recipe; the picture leads to their profile. Overall: 0 to 100 from speed (45 %), quality (30 %), the browser check (5 %) and my rating (20 %); the run with the highest score is rank 1 and my pick. The score shows the date of the newest measurement in the class. Scores are relative to the best run in the class today; a better model later moves older runs down. How the score is made. Agent test: the model builds one 3D scene as an agent, one attempt, no help; a browser checks the page, 0 to 10 points. Speed: tokens per second with one request, thinking off. Quality: the mean of 7 tests (MMLU-Pro, GPQA, IFEval, LiveCodeBench, long text 8K and 32K, GPQA with thinking), each with its 95 % margin of error on the recipe page. Memory: the largest context that loaded and answered. All other numbers (each quality test, time, peak memory, sparkDash, engine, quant) are on the recipe page. Only a run with every part done and independently checked is listed. Click a row for the recipe, the exact command and the raw files.

The whole field

MMLU-Pro × speed

MMLU-Pro, % ↑
Speed, tok/s (1 request) →

Each pin is one setup with both new numbers. The line through a pin is the 95 % margin of error of MMLU-Pro. Click a pin for the recipe.