Twoody

Local LLM calculator

The best local LLM for your Mac Studio

From the M1 Max to the M5 Ultra with 512 GB: the largest models a Mac can hold, and how fast they write.

Your computer Memory Recommended — runs comfortably Writes One click in Twoody

M5 Max — MacBook Pro, Mac Studio

 36 GB GLM-4.7-Flash 100+ tokens/s Qwen3 14B
48 GB GLM-4.7-Flash 100+ tokens/s Qwen3 14B
64 GB GLM-4.7-Flash 100+ tokens/s Qwen3 14B
128 GB Qwen3-Next 80B-A3B 96–193 tokens/s Qwen3 14B

M5 Ultra — Mac Studio

 96 GB gpt-oss-120b 92–163 tokens/s Qwen3 14B
256 GB Qwen3 235B-A22B 28–50 tokens/s Qwen3 14B
512 GB Qwen3 235B-A22B 28–50 tokens/s Qwen3 14B

M3 Ultra — Mac Studio

 96 GB gpt-oss-120b 63–90 tokens/s Qwen3 14B
256 GB Qwen3 235B-A22B 20–28 tokens/s Qwen3 14B
512 GB Qwen3 235B-A22B 20–28 tokens/s Qwen3 14B

M4 Max — MacBook Pro, Mac Studio

 36 GB GLM-4.7-Flash 73–106 tokens/s Qwen3 14B
48 GB gpt-oss-20b 85–122 tokens/s Qwen3 14B
64 GB gpt-oss-20b 85–122 tokens/s Qwen3 14B
128 GB Qwen3-Next 80B-A3B 53–107 tokens/s Qwen3 14B

M2 Ultra — Mac Studio

 64 GB gpt-oss-20b 89–128 tokens/s Qwen3 14B
128 GB gpt-oss-120b 63–91 tokens/s Qwen3 14B
192 GB Qwen3 235B-A22B 20–28 tokens/s Qwen3 14B

M2 Max — MacBook Pro, Mac Studio

 32 GB gpt-oss-20b 62–90 tokens/s Qwen3 14B
64 GB gpt-oss-20b 62–90 tokens/s Qwen3 14B
96 GB Qwen3-Next 80B-A3B 39–78 tokens/s Qwen3 14B

M1 Ultra — Mac Studio

 64 GB gpt-oss-20b 75–107 tokens/s Qwen3 14B
128 GB gpt-oss-120b 52–75 tokens/s Qwen3 14B

M1 Max — MacBook Pro, Mac Studio

 32 GB gpt-oss-20b 56–80 tokens/s Qwen3 14B
64 GB gpt-oss-20b 56–80 tokens/s Qwen3 14B

Estimates, not measurements, computed from public llama.cpp benchmarks. Figures reviewed on September 26, 2026.

With 128 to 512 GB of unified memory, a Mac Studio holds models no graphics card can: gpt-oss-120b, Qwen3.5 122B-A10B, even Qwen3 235B-A22B.

Its Max and Ultra chips read their memory at 400 GB/s to 1.2 TB/s: mixtures of experts answer at dozens of tokens per second.

Quiet even under load, it keeps its speed through long sessions.

Local LLM calculator

Questions about running an LLM locally

Which LLM for a Mac Studio with an Ultra chip?

With 256 or 512 GB, Qwen3 235B-A22B, the largest model here, runs comfortably; gpt-oss-120b and Qwen3.5 122B-A10B write faster.

Is 128 GB enough for a 70B model?

Yes, comfortably: Llama 3.3 70B needs about 48 GB at 4-bit. With 128 GB, mixtures of experts such as gpt-oss-120b fit too.

Max or Ultra for a local LLM?

The Ultra doubles the memory bandwidth and the memory: faster answers with large models, and the largest models. For models up to 70B, a Max is enough.

The best local LLM, by computer

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