The best local LLM for a Mac Studio M4 Ultra (192 GB) is Qwen3.8-Flash-Next at 78 tok/s (estimated). With 192 GB of unified memory it runs 66 of the models in the LLMCheck index — from compact options up to 320B-class models. For everyday chat and coding, Qwen3.8-Flash-Next is the sweet spot. Full ranking below.
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Mac Studio M4 Ultra (192GB) on Amazon → · not sure? the Mac Advisor picks a config →
Ranked by LLMCheck suitability (capability balanced against speed on the M4 Ultra). Click a model for its full benchmark and setup. Every speed carries its provenance mark: most are index estimates from the memory-bandwidth model, and a filled square is a published measurement — submit a real run →
| # | Model | Size | License | Speed | Capability |
|---|---|---|---|---|---|
| 1 | Qwen3.8-Flash-Next | 125B | Qwen Custom | estimated78 tok/s | 47/50 |
| 2 | MiMo-V2.6-Flash | 309B | MIT | estimated39 tok/s | 49/50 |
| 3 | DeepSeek V4 Flash | 284B | MIT | estimated42 tok/s | 47/50 |
| 4 | DeepSeek V4 Flash Vision-Exp | 305B | MIT | estimated42 tok/s | 47/50 |
| 5 | Qwen3.8-27B | 27.8B | Apache 2.0 | estimated49 tok/s | 46/50 |
| 6 | GLM-5.3-Flash | 320B | MIT | estimated32 tok/s | 48/50 |
| 7 | Inkling-Small | 276B | Apache 2.0 | estimated40 tok/s | 46/50 |
| 8 | Qwen 3.6-27B | 27B | Apache 2.0 | estimated52 tok/s | 44/50 |
| 9 | KAT-Coder-V2.5 | 35B | Apache 2.0 | estimated89 tok/s | 39/50 |
| 10 | Laguna S 2.1 | 118B | OpenMDW | estimated48 tok/s | 43/50 |
| 11 | Qwen3-235B-A22B | 235B | Apache 2.0 | estimated22 tok/s | 46/50 |
| 12 | Nemotron 3.5 Lightning | 30B | OpenMDW | estimated102 tok/s | 36/50 |
Showing the top 12 of 66 models that fit in 192 GB. See the full leaderboard or all benchmarks.
The fastest way to get started is Ollama. Install it, then find the top pick for your Mac in its library and copy the exact tag it lists:
Find Qwen3.8-Flash-Next in the Ollama library → · model card on Hugging Face →
Prefer a GUI? LM Studio gives you a one-click download and chat window. For step-by-step help see our Ollama install guide, or open the Qwen3.8-Flash-Next on M4 Ultra benchmark page for exact settings.
The Mac Studio M4 Ultra (192 GB) comfortably runs 66 of the models in the LLMCheck index, led by Qwen3.8-Flash-Next. Grab one and start running LLMs offline today:
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Qwen3.8-Flash-Next (125B, Qwen Custom) is the best all-round pick at 78 tok/s (estimated) on the M4 Ultra. If you want maximum speed, Maple Preview 20B-A1B hits 503 tok/s (estimated); for maximum capability, MiMo-V2.6-Flash still fits in 192 GB.
About 66 of the 89 models in the LLMCheck leaderboard fit in 192 GB of unified memory, from compact models up to GLM-5.3-Flash (320B).
Yes. A 70B model in Q4 quantization needs roughly 40–44 GB of memory, which fits in 192 GB with headroom for context.
192 GB is plenty for local AI — you can run capable 30B–70B-class models. Because Apple Silicon uses unified memory, that figure is both your system RAM and your VRAM.