{"verdict":"no","receipt":"https://fitllm.run/r/gpt-oss-120b-8bit-on-mac-64gb","model":"gpt-oss-120b","hardware":"Mac 64GB","quant":"8-bit","kvBits":16,"ctx":8192,"memory":{"usedGB":130.41,"totalGB":64,"freeGB":-66.41,"breakdown":{"weightsGB":108.78,"kvCacheGB":0.29,"overheadGB":13.34,"reserveGB":8}},"maxContext":0,"contextLimits":{"recommendedMax":0,"hardLimit":0,"headroomPct":20},"fix":"A 192 GB Mac (M2 Ultra) would fit it.","note":"usedGB = total required to run: weights + KV cache + runtime overhead + OS/GPU reserve. Runtime resident-weights measurements (e.g. oMLX actual_size) read lower — a different metric, not a prediction error.","source":"https://fitllm.run","engine":"fitllm-engine (MIT)","data":"https://fitllm.run/data (CC0)"}