{
  "dataset": "WikiText-2",
  "seed": 42,
  "steps_per_variant": 30,
  "baseline": {
    "architecture": "llama_modern",
    "optimizer": "adamw",
    "lm_loss": 5.7470526,
    "perplexity": 313.266,
    "parameters": 139584
  },
  "method": {
    "architecture": "llama_modern",
    "optimizer": "muon",
    "lm_loss": 5.8016435,
    "perplexity": 330.8428,
    "parameters": 139584,
    "orthogonality_error": 0.033477
  },
  "relative": {
    "lm_loss_percent": 0.9499,
    "perplexity_percent": 5.6108
  },
  "schema_version": 2,
  "manifest_ref": "reproduction:muon",
  "evaluation_protocol": {
    "tier": "l2_public_dataset",
    "seeds": [
      42
    ],
    "formal_comparison": false,
    "claim_policy": "single/few-seed smoke result; do not claim a stable improvement"
  },
  "provenance": {
    "artifact_path": "docs/reproductions/2502.16982-muon/metrics/wikitext2-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}