Local AI Advisor

Can MacBook Pro M5 Max 128 GB run Mistral Small 4 (119B-A6.5B)?

128 GB unified · 614 GB/s memory bandwidth · Mistral Small 4 (119B-A6.5B) has 119.4B parameters (6.5B active per token).

Short answer

Yes, excellent for chat and comfortable or better for every workload we test.

Best quantization for chat: 5-bit (77 GB of weights) on LM Studio. Generation: 50–85 tok/s, leaving about 40 GB free for your other apps.

How it rates for each workload

Same model and machine, different jobs. Agents and long documents send far bigger prompts than chat, so they need much more speed and memory.

WorkloadVerdictQuantGenerationFirst replyContext
Chatwith Open WebUIExcellent5-bit50–85 tok/sunder 1 s8KDetails
Coding questionswith ContinueExcellent5-bit50–80 tok/s≈2 s16KDetails
Coding in a repositorywith AiderComfortable6-bit40–65 tok/s≈6 s32KDetails
Agentic codingwith OpenCodeComfortable6-bit40–65 tok/s≈8 s32KDetails
Long documents (64K)with Open WebUIExcellent5-bit40–65 tok/s≈30 s64KDetails

Speeds are bandwidth-based estimates; no direct benchmark exists for this pair. “First reply” is the time to read the workload’s opening prompt. How we calculate

Get it running

Copy-paste commands for the 5-bit build with a 64K context. Ollama and llama.cpp download the file straight from Hugging Face.

ollama run hf.co/unsloth/Mistral-Small-4-119B-2603-GGUF:UD-Q5_K_XL

This build is split into 3 files, which Ollama can't import from Hugging Face. Use llama.cpp or LM Studio instead.

Different tool, context size or workload?

These pages use typical settings. The full check models your exact setup.