Apple · apple

Apple M3 Pro

Apple M3 Pro has 18 GB of unified memory at 154 GB/s — about 12.56 GiB usable after driver and compositor overhead. 1854 of 2118 indexed models fit at 8K context with q4_0 KV. Note only 14 GB of its 18 GB is allocatable to the GPU.

Spec sheet· bandwidth, theoreticalFrom the file· fit from summed bytesPredicted· speed
Memory
18 GB
LPDDR5-6400
Bandwidth
154 GB/s
192-bit bus
Tensor FP16
dense
TDP
KV cachef16q8_0q4_0quantizing the KV cache is a ~2× lever on the dominant term at long context
text 1591video 15vision language 160audio asr 39audio tts 21image 2embedding 26

What fits at 8K context

largest quantization that fits, per model · 1854 of 2118 indexed
ModelBest quantParamsWeightsKVTotal in memoryHeadroomtok/s
GLM-4-32B-0414-Korean-CultureI1-IQ3_XS32.6B12.72 GiB0.13 GiB13.50 GiB0.00 GiB10±8.3%
GLM-Z1-32B-0414IQ3_XS32.6B12.72 GiB0.13 GiB13.50 GiB0.00 GiB10±8.3%
GLM-4-32B-0414IQ3_XS32.6B12.72 GiB0.13 GiB13.50 GiB0.00 GiB10±8.3%
Wan2.2-S2V-14BQ4_K_M16.3B12.91 GiB0.00 GiB13.49 GiB0.01 GiB10±8.3%
medgemma-27b-itI1-Q3_K_M28.8B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
gemma-3-27b-it-abliterated-refined-visionI1-Q3_K_M27.4B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
gemma-3-27b-it-abliteratedQ3_K_M27.4B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
Nidum-Gemma-3-27B-it-UncensoredI1-Q3_K_M27.4B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
gemma-3-27b-itQ3_K_M27.4B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
AtomicGPT-gemma3-27bI1-Q3_K_M27.4B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
Unbound-v1.12.0-27BI1-Q3_K_M27.4B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
Mira-v1.12-Ties-27BI1-Q3_K_M27.4B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
Medgamma27BI1-Q3_K_M27.0B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
medgemma-27b-text-itQ3_K_M27.0B12.51 GiB0.35 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Gembrain-X-Core-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Gembrain-X-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-31B-Isometry-Fabled-PersonaI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Versipellis-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma4-Gutenberg-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
G4-MeroMero-31B-uncensored-hereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Novelist-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Wanabi-Gemma4-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
G4-Alice-v1.2-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Agares-31B-v1I1-IQ3_XS30.7B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma4-Gutenberg-31B-HereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-Ortenzya-The-Creative-Wordsmith-31B-it-uncensored-hereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Gemsicle-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Gembrain-31B-it-uncensored-hereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Melinoe-Gemma4-31B-VL-hereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
G4-MeroMero-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Glistening-Gem-31B-v1.0I1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Melinoe-Gemma4-31B-VLI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-31B-Storymaxxed3I1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Huihui-gemma-4-31B-it-qat-q4_0-unquantized-abliteratedI1-IQ3_XS32.7B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-Queen-it-qat-q4_0-unquantizedI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-it-qat-q4_0-unquantized-hereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-AssGuard-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
copywriter-gemma4-31bI1-IQ3_XS32.7B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-heretic-finetuneI1-IQ3_XS30.7B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Garnet-V2-31B-it-ultra-uncensored-hereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-it-abliterated-v3I1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-it-noloopI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Webs-Sejong-31B-v7I1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Lilith-31B-v1.0I1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
JGOS-31B-ThinkI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-MergemaxxedI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
K1-v6-zeroI1-IQ3_XS32.7B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Queen-31B-it-uncensored-hereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Sphinsikus-Chronist-31BI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-it-hereticI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma4-31B-Finetuned-V2I1-IQ3_XS32.7B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-31B-storymaxxedI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-31B-storymaxxed2I1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-it-Grand-Horror-X-INTENSE-HERETIC-UNCENSORED-ThinkingI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-it-Mystery-Fine-Tune-HERETIC-UNCENSORED-ThinkingI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-it-The-DECKARD-HERETIC-UNCENSORED-ThinkingI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Huihui-gemma-4-31B-it-abliterated-v2I1-IQ3_XS32.7B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
Gemma-4-Queen-31B-itI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31B-it-abliteratedI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
gemma-4-31b-it-heretic-araI1-IQ3_XS31.3B12.17 GiB0.68 GiB13.49 GiB0.01 GiB10±8.3%
From the filePredictedwhat these mean

Speed is modeled, not measured: decode is memory-bandwidth bound, so tokens per second is bytes read per token against achievable bandwidth. Mixture-of-experts models carry a wider band because only the routed experts are read each step, and few have been measured publicly.

Measured on this card

third-party benchmarks, aggregated
WorkloadMedianMiddle 50%Runs
Prompt processing339.31 tok/s305.24343.177
Text generation17.53 tok/s16.9530.517
Benchmarked· n=7

Aggregated from community-submitted runs, so the spread is wide by nature — it covers different models, resolutions, step counts and settings, not one controlled configuration. Read the middle 50% rather than the median alone. These figures are reproduced with attribution from llama.cpp-discussion-4167.

Questions people ask

What AI models can a Apple M3 Pro run?
1854 of 2118 indexed open-weight models fit a Apple M3 Pro at 8,192 context with q4_0 KV cache, the largest being GLM-4-32B-0414-Korean-Culture at I1-IQ3_XS. That covers text, vision-language, image, video and speech models.
How much usable memory does a Apple M3 Pro actually have?
Its nameplate is 18 GB, but about 12.56 GiB is available to a model once driver and compositor overhead is accounted for, and only 14 GB of the pool can be allocated to the GPU at all.
Is a Apple M3 Pro fast for local AI?
Its memory bandwidth is 154 GB/s, and that figure — not teraflops — is what governs token generation speed. Capacity decides what you can run; bandwidth decides how fast it runs.