OpenAI
MLX Community

gpt-oss-120b benchmark on an Apple's logo.M4 Max · 128 GB

<- Runs

Prompt tokens

40,960

Generation tokens

10,240

Trials passed

10/10

Verified

84.0 tok/s

820.2 tok/s

Peak memory

65.00/128 GB

Runs ok

Trials

Decode / Prefill Speeds

Metadata

metadata.json
{
"runId": "run_0fd56fa6-a301-4839-9884-509962f97646",
"bundleId": "mlx-gpt-oss-120b-4bit-6e0418",
"status": "verified",
"promptTokens": 40960,
"completionTokens": 10240,
"contextLength": 5120,
"harness": {
"version": "0.1.18",
"gitSha": "c60e6d1"
},
"runtime": {
"name": "mlx_lm",
"version": "0.31.2",
"buildFlags": null
},
"model": {
"displayName": "gpt-oss-120b",
"format": "mlx",
"quant": "4bit",
"architecture": "gpt_oss",
"source": "mlx-community/gpt-oss-120b-4bit",
"fileSizeBytes": 65774504710,
"lab": {
"name": "OpenAI",
"slug": "openai"
},
"quantizedBy": {
"name": "MLX Community",
"slug": "mlx-community"
}
},
"device": {
"cpu": "Apple M4 Max",
"cpuCores": 16,
"gpu": "Apple M4 Max",
"gpuCores": 40,
"gpuCount": 1,
"ramGb": 128,
"osName": "macOS",
"osVersion": "26.4.1"
},
"decodeTpsMean": 84,
"prefillTpsMean": 820.2,
"ttftP50Ms": 5001.07,
"idleTpsMean": 6648,
"peakRssMb": 66560,
"trialsPassed": 10,
"trialsTotal": 10,
"runnabilityScore": 0.6403860714285715,
"bundleSha256": "4c7e485a338a81c857bcfa5d92d3748ea2ebbfbfb31d0e22384160d186a83422",
"createdAt": "2026-04-24T19:49:26.276Z"
}