OpenAI
MLX Community

gpt-oss-20b benchmark on an Apple's logo.M4 · 32 GB

<- Runs

Prompt tokens

40,960

Generation tokens

10,240

Trials passed

10/10

Verified

25.0 tok/s

249.9 tok/s

Peak memory

12.00/32 GB

Runs poorly

Trials

Decode / Prefill Speeds

Metadata

metadata.json
{
"runId": "run_201fa900-7c27-44df-a7d1-6e4ebec070fc",
"bundleId": "mlx-gpt-oss-20b-mxfp4-q8-bf412a",
"status": "verified",
"promptTokens": 40960,
"completionTokens": 10240,
"contextLength": 5120,
"harness": {
"version": "0.1.21",
"gitSha": "f68adca"
},
"runtime": {
"name": "mlx_lm",
"version": "0.31.2",
"buildFlags": null
},
"model": {
"displayName": "gpt-oss-20b",
"format": "mlx",
"quant": "mxfp4",
"architecture": "gpt_oss",
"source": "mlx-community/gpt-oss-20b-MXFP4-Q8",
"fileSizeBytes": 12076207568,
"lab": {
"name": "OpenAI",
"slug": "openai"
},
"quantizedBy": {
"name": "MLX Community",
"slug": "mlx-community"
}
},
"device": {
"cpu": "Apple M4",
"cpuCores": 10,
"gpu": "Apple M4",
"gpuCores": 10,
"gpuCount": 1,
"ramGb": 32,
"osName": "macOS",
"osVersion": "15.7.4"
},
"decodeTpsMean": 25,
"prefillTpsMean": 249.9,
"ttftP50Ms": 17080.97,
"idleTpsMean": 1374,
"peakRssMb": 12288,
"trialsPassed": 10,
"trialsTotal": 10,
"runnabilityScore": 0.490102380952381,
"bundleSha256": "b801e0e04fefcc2161c1a05a52acee63a654d97e43f70d6a14ec4a1886df76fe",
"createdAt": "2026-04-17T17:42:36.700Z"
}