{
  "dataset": "WikiText-2 + synthetic single-needle retrieval",
  "seed": 42,
  "steps": 90,
  "standard_rope": {
    "perplexity": 291.00028807963713,
    "needle_accuracy": 0.9739583333333334,
    "far_needle_accuracy": 0.9791666666666666
  },
  "hybrid_mobius_rope": {
    "perplexity": 290.9219123858226,
    "needle_accuracy": 0.953125,
    "far_needle_accuracy": 0.9583333333333334
  },
  "relative": {
    "perplexity_reduction_percent": 0.026933201452040714,
    "needle_accuracy_points": -2.083333333333337,
    "far_needle_accuracy_points": -2.083333333333326
  },
  "schema_version": 2,
  "manifest_ref": "reproduction:mobius-rope",
  "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/2607.21405-mobius-rope/metrics/wikitext-2-needle-seed42.json",
    "historical_migration": "historical-metrics-v2-2026-08-09",
    "original_code_commit": "not recorded",
    "dataset_fingerprint": "not recorded in historical artifact"
  }
}