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All estimates are approximations based on mathematical models and public specifications. Actual performance may vary. Do not make purchasing decisions based solely on these estimates.

Data sourced from Hugging Face, Ollama, and official model documentation. Model names and logos are trademarks of their respective owners.

© 2026 Will It Run AI — Fase Consulting Ibiza, S.L. (NIF: B57969656)

Home/Hardware/Macs/Mac Studio M3 Ultra 256GB
Apple

Apple

Mac Studio M3 Ultra 256GB

M3DesktopM3UNIFIEDMetal
256GB
Unified Memory
819GB/s
Bandwidth

About this GPU for AI

Mac Studio M3 Ultra 256GB with 256 GB unified memory. Third-generation Apple Silicon built on 3nm process with dynamic caching GPU architecture, significantly improving AI inference efficiency.

Specifications

Compute
ArchitectureM3
Memory
Unified Memory256 GB
Bandwidth819 GB/s
General
FamilyM3
SegmentDesktop
InterconnectUNIFIED
Compute PlatformMETAL

For AI Workloads

Strengths
  • 3nm process enables higher efficiency
  • Dynamic caching GPU improves utilization
  • Up to 400 GB/s memory bandwidth (Max)
  • Hardware-accelerated ray tracing
  • Strong MLX optimization
Considerations
  • Base M3 still limited to 24 GB unified memory
  • Premium pricing for high-memory configurations

Architecture

M3

Apple M3 is built on TSMC's 3nm process, the first consumer chips at this node. It introduces Dynamic Caching for more efficient GPU memory allocation and hardware-accelerated ray tracing.

AI Relevance

Dynamic Caching improves GPU utilization for compute workloads including ML inference. The M3 Ultra with up to 512 GB unified memory can theoretically hold even unquantized 70B models, though memory bandwidth remains the throughput bottleneck.

Process: TSMC 3nmPlatform: METALPrecisions: FP32, FP16

M3's dynamic caching GPU architecture allocates local memory in hardware in real-time, improving GPU utilization for AI workloads. The M3 Max reaches 400 GB/s bandwidth, competitive with mid-range discrete GPUs.

Recommendations by Workload

Agentic Coding

C

Devstral 2 123B Instruct

This model is still usable for agentic-coding, but it is not the most specialized pick. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, lm-studio.

Decode 7.4 tok/s · 42K ctx · llama.cpp
142.0 GB / 256.0 GB Unified Memory

Chat

C

Mistral Small 4 119B

This model is a direct match for chat. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, lm-studio.

Decode 22.3 tok/s · 14K ctx · llama.cpp
101.9 GB / 256.0 GB Unified Memory

Coding

C

Devstral 2 123B Instruct

This model is a direct match for coding. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, lm-studio.

Decode 7.4 tok/s · 24K ctx · llama.cpp
122.8 GB / 256.0 GB Unified Memory

RAG

C

Command A 111B

This model is a direct match for rag. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, ollama, lm-studio.

Decode 8.2 tok/s · 45K ctx · llama.cpp
130.9 GB / 256.0 GB Unified Memory

Reasoning

C

Devstral 2 123B Instruct

This model is a direct match for reasoning. It belongs to a current frontier family for local AI. It fits natively with comfortable headroom. Known channels: huggingface, lm-studio.

Decode 7.4 tok/s · 24K ctx · llama.cpp
122.8 GB / 256.0 GB Unified Memory

Full Model Compatibility

MistralMixtral 8x22B
C50
141B120.7 GB12 tok/s24K ctx
moe
MistralMistral Small 4 119B
C50
119B102.2 GB22 tok/s29K ctx
moe
MistralDevstral 2 123B Instruct
C49
123B122.8 GB7 tok/s24K ctx
dense
AlibabaQwen3-Coder-Next
C48
80B78.1 GB35 tok/s38K ctx
moe
CohereCommand A 111B
C48
111B113.6 GB8 tok/s26K ctx
dense
AlibabaQwen3-VL 30B A3B Instruct
C47
30B47.6 GB80 tok/s62K ctx
moe
AlibabaQwen3-Coder 30B A3B Instruct
C47
30.5B48.0 GB77 tok/s62K ctx
moe
AlibabaQwen 3 235B A22B
C47
235B175.3 GB10 tok/s17K ctx
moe
UnslothQwen3.5 122B A10B
C47
122B107.4 GB9 tok/s27K ctx
dense
UnslothQwen3.5 9B
C46
9B35.4 GB101 tok/s83K ctx
dense
HauhauCSHQwen3.5 9B Uncensored HauhauCS Aggressive
C46
9B35.4 GB101 tok/s83K ctx
dense
BartowskiBMeta Llama 3.1 8B Instruct
C46
8B34.7 GB114 tok/s85K ctx
dense
Lmstudio-communityLQwen3.5 9B
C46
9B35.4 GB101 tok/s83K ctx
dense
XtunerXllava llama 3 8b v1 1
C46
8B34.7 GB114 tok/s85K ctx
dense
UnslothDeepSeek R1 0528 Qwen3 8B
C46
8B34.7 GB114 tok/s85K ctx
dense
TheBlokeTLlama 2 7B Chat
C46
7B33.9 GB130 tok/s87K ctx
dense
MaziyarPanahiMMeta Llama 3 8B Instruct
C46
8B34.7 GB114 tok/s85K ctx
dense
TheBlokeTMistral 7B Instruct v0.2
C46
7B33.9 GB130 tok/s87K ctx
dense
MaziyarPanahiMMistral 7B Instruct v0.3
C46
7B33.9 GB130 tok/s87K ctx
dense
UnslothQwen3.5 4B
C46
4B31.8 GB228 tok/s93K ctx
dense
BartowskiBLlama 3.2 3B Instruct
C46
3B31.5 GB263 tok/s94K ctx
dense
BartowskiBgemma 2 2b it
C46
2B31.0 GB357 tok/s95K ctx
dense
Googlegemma 2b
C46
2B30.6 GB457 tok/s96K ctx
dense
Lmstudio-communityLgemma 3 4b it
C46
4B31.8 GB228 tok/s93K ctx
dense
QwenQwen2.5 3B Instruct
C46
3B31.2 GB304 tok/s95K ctx
dense
Hugging-quantsHLlama 3.2 1B Instruct Q8 0
C46
1B30.2 GB585 tok/s98K ctx
dense
QwenQwen2.5 1.5B Instruct
C46
1.5B30.3 GB557 tok/s97K ctx
dense
TheDrummerTGemmasutra Mini 2B v1
C46
2B30.6 GB457 tok/s96K ctx
dense
AlibabaQwen 2.5 72B
C46
72B83.7 GB13 tok/s35K ctx
dense
Ggml-orgGSmolVLM 500M Instruct
C46
0.5B29.8 GB585 tok/s99K ctx
dense
TheBlokeTTinyLlama 1.1B Chat v1.0
C46
1.1B30.0 GB557 tok/s98K ctx
dense
AlibabaQwen 2.5 VL 72B
C46
72B83.7 GB13 tok/s33K ctx
dense
Ggml-orgGembeddinggemma 300M
C46
0.3B29.6 GB585 tok/s100K ctx
dense
MetaLlama 3.3 70B
C45
70B82.2 GB13 tok/s36K ctx
dense
MistralCodestral 2 25.08
C45
22B45.4 GB42 tok/s65K ctx
dense
MistralDevstral Small 2 24B Instruct
C45
24B46.9 GB38 tok/s63K ctx
dense
UnslothQwen3.5 27B
C45
27B49.2 GB34 tok/s60K ctx
dense
MistralDevstral Small 1.1
C45
24B46.9 GB38 tok/s63K ctx
dense
UnslothQwen3.5 35B A3B
C45
35B55.4 GB26 tok/s53K ctx
dense
Unslothgemma 3 27b it
C45
27B49.2 GB34 tok/s60K ctx
dense
AlibabaQwen 2.5 Coder 32B
C45
32B53.1 GB29 tok/s56K ctx
dense
Lmstudio-communityLQwen3.5 35B A3B
C44
35B55.4 GB26 tok/s53K ctx
dense
DeepSeekDeepSeek R1 671B
F0
671B443.6 GB4 tok/s7K ctx
moe
Z.aiGLM-5
F0
744B488.6 GB4 tok/s6K ctx
moe
Moonshot AIKimi K2.5
F0
1000B643.5 GB3 tok/s5K ctx
moe
MistralMistral Large 3
F0
675B446.7 GB4 tok/s7K ctx
+1moe
AlibabaQwen3-Coder 480B A35B Instruct
F0
480B326.8 GB5 tok/s9K ctx
moe
DeepSeekDeepSeek V3 671B
F0
671B443.6 GB4 tok/s7K ctx
moe
UnslothQwen3.5 397B A17B
F0
397B332.7 GB2 tok/s9K ctx
dense
MetaLlama 4 Maverick 17B 128E
F0
400B275.2 GB7 tok/s11K ctx
moe

Just out of reach

Models you could run with an upgrade

High-quality models that need a bit more memory

DeepSeekDeepSeek R1 671B
671BTier 5Needs ~449.4 GB
Z.aiGLM-5
744BTier 5Needs ~494.9 GB
Moonshot AIKimi K2.5
1000BTier 5Needs ~648.5 GB
MistralMistral Large 3
675BTier 5Needs ~453.1 GB
AlibabaQwen3-Coder 480B A35B Instruct
480BTier 5Needs ~332.3 GB

Upgrade paths

Upgrade from Mac Studio M3 Ultra 256GB

See what you unlock with more powerful hardware

Upgrade options

Upgrade options

AMDAMD Instinct MI325X 256GBNext step up
6000 GB/s (+5181)
A
Unlocks Llama 4 Maverick 17B 128E, K EXAONE 236B A23B, Baichuan M3 235B+1 more · +677% faster avg

 

AMDAMD Instinct MI350X 288GBBest value
288 GB VRAM (+32)8000 GB/s (+7181)
A
Unlocks Qwen3-Coder 480B A35B Instruct, Llama 4 Maverick 17B 128E, K EXAONE 236B A23B+2 more · +933% faster avg

~$8,000 MSRP

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