OpenAI
MLX Community

gpt-oss-20b benchmark on an Apple's logo.M3 Max · 128 GB

<- Runs

Prompt tokens

40,960

Generation tokens

10,240

Trials passed

10/10

Verified

25.9 tok/s

740.5 tok/s

Peak memory

12.00/128 GB

Runs ok

Trials

Decode / Prefill Speeds

Metadata

metadata.json
{
"runId": "run_4290b57f-ae83-4140-b2d1-532eadf2c3fe",
"bundleId": "mlx-gpt-oss-20b-mxfp4-q4-9ce8f0",
"status": "verified",
"promptTokens": 40960,
"completionTokens": 10240,
"contextLength": 5120,
"harness": {
"version": "0.1.21",
"gitSha": "unknown"
},
"runtime": {
"name": "mlx_lm",
"version": "0.30.2",
"buildFlags": null
},
"model": {
"displayName": "gpt-oss-20b",
"format": "mlx",
"quant": "mxfp4",
"architecture": "gpt_oss",
"source": "mlx-community/gpt-oss-20b-MXFP4-Q4",
"fileSizeBytes": 11178569159,
"lab": {
"name": "OpenAI",
"slug": "openai"
},
"quantizedBy": {
"name": "MLX Community",
"slug": "mlx-community"
}
},
"device": {
"cpu": "Apple M3 Max",
"cpuCores": 16,
"gpu": "Apple M3 Max",
"gpuCores": 40,
"gpuCount": 1,
"ramGb": 128,
"osName": "macOS",
"osVersion": "26.3.1"
},
"decodeTpsMean": 25.9,
"prefillTpsMean": 740.5,
"ttftP50Ms": 5228.2,
"idleTpsMean": 1305,
"peakRssMb": 12288,
"trialsPassed": 10,
"trialsTotal": 10,
"runnabilityScore": 0.6804214285714285,
"bundleSha256": "6d795197f790de1d8972e1e637b9cc80506e9aa75479c40fca13fe853a22fd9e",
"createdAt": "2026-04-16T04:08:11.843Z"
}
gpt-oss-20b Run Details on M3 Max | whatcani.run