{
  "train_micro_batch_size_per_gpu": 1,
  "gradient_accumulation_steps": 1,

  "zero_optimization": {
    "stage": 3,
    "overlap_comm": true,
    "contiguous_gradients": true,
    "reduce_bucket_size": 200000000,
    "stage3_prefetch_bucket_size": 100000000,
    "stage3_param_persistence_threshold": 1000000,

    "offload_optimizer": { "device": "cpu", "pin_memory": true },
    "offload_param":     { "device": "none" }
  },

  "optimizer": {
    "type": "AdamW",
    "params": { "lr": 2e-5, "betas": [0.9, 0.999], "eps": 1e-8, "weight_decay": 0.1 }
  },

  "bf16": { "enabled": true },
  "fp16": { "enabled": false },

  "gradient_clipping": 1.0,
  "wall_clock_breakdown": false
}