{
  "checkpoint_id": "ckpt_20260505_134125_4500_22deff1b_9470fbb7",
  "created_at": "2026-05-05T13:41:25.519405",
  "iteration": 4500,
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  "model_config": {
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    "n_head": 4,
    "n_embd": 256,
    "vocab_size": 50257,
    "block_size": 1024,
    "dropout": 0.1,
    "bias": true,
    "initial_connections": 0.1,
    "connection_growth_rate": 0.05,
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  "training_config": {
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    "batch_size": 2,
    "max_iters": 500,
    "warmup_iters": 5000,
    "lr_decay_iters": 50000,
    "min_lr": 1e-05,
    "weight_decay": 0.1,
    "grad_clip": 1.0,
    "enable_curriculum_learning": true,
    "enable_introspection": true
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  "data_config": {
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    "batch_size": 2,
    "block_size": 1024
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  "metrics": {
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    "connection_ratio": 1.0,
    "tokens_processed": 9216000,
    "training_speed_iters_per_sec": 0.10929397468016763
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  "tags": [
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    "high_quality",
    "nanecho",
    "curriculum",
    "introspection"
  ],
  "parent_checkpoint": null,
  "notes": "Training checkpoint at iteration 4500 (resumed from iteration 4000) | Phase: adaptive_mastery",
  "file_size_mb": 250.30978298187256,
  "quality_score": 691200.7790945795
}