quantize_config.json

{
  "bits": 4,
  "group_size": 128,
  "damp_percent": 0.01,
  "desc_act": false,
  "sym": true,
  "true_sequential": true,
  "model_name_or_path": "opt-125m-4bit",
  "model_file_base_name": "gptq_model-4bit-128g"
}