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

25.7 tok/s

225.6 tok/s

Peak memory

12.00/32 GB

Runs poorly

Trials

Decode / Prefill Speeds

Metadata

metadata.json
{
"runId": "run_659e9355-d33a-4415-b62d-671e1bcea80d",
"bundleId": "mlx-gpt-oss-20b-mxfp4-q4-f6a5bd",
"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-Q4",
"fileSizeBytes": 11178569159,
"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": 25.7,
"prefillTpsMean": 225.6,
"ttftP50Ms": 18367.88,
"idleTpsMean": 2004,
"peakRssMb": 12288,
"trialsPassed": 10,
"trialsTotal": 10,
"runnabilityScore": 0.489202380952381,
"bundleSha256": "7b161885c8b8a8efc8dd5988564007385bf573ec528d24243747b0099527e220",
"createdAt": "2026-04-17T14:15:33.926Z"
}