{
  "timestamp": "2026-02-24T20:46:17",
  "benchmark": {
    "total_cases": 78,
    "in_label_space_cases": 70,
    "overall": {
      "top1_accuracy": 0.7949,
      "top3_accuracy": 0.8205,
      "top5_accuracy": 0.8333,
      "chapter_accuracy": 0.8974
    },
    "in_label_space": {
      "top1_accuracy": 0.8857,
      "top3_accuracy": 0.9143,
      "top5_accuracy": 0.9286,
      "chapter_accuracy": 0.9571
    },
    "by_category": {
      "easy": {
        "total": 27,
        "top1": 26,
        "top3": 27,
        "top5": 27,
        "chapter": 27,
        "top1_acc": 0.9629629629629629,
        "top3_acc": 1.0,
        "top5_acc": 1.0,
        "chapter_acc": 1.0
      },
      "edge_case": {
        "total": 21,
        "top1": 15,
        "top3": 16,
        "top5": 17,
        "chapter": 18,
        "top1_acc": 0.7142857142857143,
        "top3_acc": 0.7619047619047619,
        "top5_acc": 0.8095238095238095,
        "chapter_acc": 0.8571428571428571
      },
      "multilingual": {
        "total": 20,
        "top1": 20,
        "top3": 20,
        "top5": 20,
        "chapter": 20,
        "top1_acc": 1.0,
        "top3_acc": 1.0,
        "top5_acc": 1.0,
        "chapter_acc": 1.0
      },
      "known_failure": {
        "total": 10,
        "top1": 1,
        "top3": 1,
        "top5": 1,
        "chapter": 5,
        "top1_acc": 0.1,
        "top3_acc": 0.1,
        "top5_acc": 0.1,
        "chapter_acc": 0.5
      }
    },
    "by_language": {
      "en": {
        "total": 58,
        "top1": 42,
        "top3": 44,
        "top5": 45,
        "top1_acc": 0.7241379310344828,
        "top3_acc": 0.7586206896551724,
        "top5_acc": 0.7758620689655172
      },
      "th": {
        "total": 7,
        "top1": 7,
        "top3": 7,
        "top5": 7,
        "top1_acc": 1.0,
        "top3_acc": 1.0,
        "top5_acc": 1.0
      },
      "vi": {
        "total": 7,
        "top1": 7,
        "top3": 7,
        "top5": 7,
        "top1_acc": 1.0,
        "top3_acc": 1.0,
        "top5_acc": 1.0
      },
      "zh": {
        "total": 6,
        "top1": 6,
        "top3": 6,
        "top5": 6,
        "top1_acc": 1.0,
        "top3_acc": 1.0,
        "top5_acc": 1.0
      }
    },
    "failures": [
      {
        "text": "polyethylene pellets LDPE",
        "expected": "390110",
        "predicted": "392321",
        "confidence": 0.8091,
        "category": "easy",
        "language": "en",
        "top5": [
          "392321",
          "390110",
          "950490",
          "300490",
          "220830"
        ],
        "notes": "common plastic resin"
      },
      {
        "text": "medicine",
        "expected": "300490",
        "predicted": "300220",
        "confidence": 1.0,
        "category": "edge_case",
        "language": "en",
        "top5": [
          "300220",
          "950490",
          "310520",
          "220830",
          "240120"
        ],
        "notes": "extremely generic"
      },
      {
        "text": "paper",
        "expected": "480256",
        "predicted": "481910",
        "confidence": 1.0,
        "category": "edge_case",
        "language": "en",
        "top5": [
          "481910",
          "310520",
          "220830",
          "240120",
          "252329"
        ],
        "notes": "very generic"
      },
      {
        "text": "Nespresso coffee capsules",
        "expected": "210111",
        "predicted": "090111",
        "confidence": 0.4046,
        "category": "edge_case",
        "language": "en",
        "top5": [
          "090111",
          "300220",
          "740311",
          "210111",
          "310520"
        ],
        "notes": "branded coffee product"
      },
      {
        "text": "USB-C charging cable",
        "expected": "854239",
        "predicted": "850760",
        "confidence": 0.2069,
        "category": "edge_case",
        "language": "en",
        "top5": [
          "850760",
          "847170",
          "850440",
          "870899",
          "870332"
        ],
        "notes": "tech accessory"
      },
      {
        "text": "stainless steel bolts M10",
        "expected": "730890",
        "predicted": "760120",
        "confidence": 0.2081,
        "category": "edge_case",
        "language": "en",
        "top5": [
          "760120",
          "901890",
          "730890",
          "220830",
          "720917"
        ],
        "notes": "metal hardware"
      },
      {
        "text": "yoga pants women polyester",
        "expected": "620462",
        "predicted": "611030",
        "confidence": 1.0,
        "category": "edge_case",
        "language": "en",
        "top5": [
          "611030",
          "950490",
          "310520",
          "220830",
          "240120"
        ],
        "notes": "modern clothing description"
      },
      {
        "text": "English breakfast tea",
        "expected": "090240",
        "predicted": "090210",
        "confidence": 0.8007,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "090210",
          "392321",
          "950490",
          "220830",
          "240120"
        ],
        "notes": "black tea - code 090240 not in label space"
      },
      {
        "text": "oolong tea leaves 100g",
        "expected": "090230",
        "predicted": "090210",
        "confidence": 0.6064,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "090210",
          "220300",
          "392321",
          "950490",
          "220830"
        ],
        "notes": "semi-fermented tea - code 090230 not in label space"
      },
      {
        "text": "chamomile herbal tea bags",
        "expected": "121190",
        "predicted": "392321",
        "confidence": 0.6013,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "392321",
          "090210",
          "950490",
          "220830",
          "240120"
        ],
        "notes": "herbal infusion - not tea chapter - not in label space"
      },
      {
        "text": "fresh avocado",
        "expected": "080440",
        "predicted": "080810",
        "confidence": 1.0,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "080810",
          "950490",
          "310520",
          "220830",
          "240120"
        ],
        "notes": "avocado code 080440 not in label space"
      },
      {
        "text": "quinoa grain organic",
        "expected": "100850",
        "predicted": "080810",
        "confidence": 0.3905,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "080810",
          "100630",
          "080510",
          "070200",
          "950490"
        ],
        "notes": "quinoa code 100850 not in label space"
      },
      {
        "text": "soy sauce 500ml bottle",
        "expected": "210390",
        "predicted": "220300",
        "confidence": 0.4237,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "220300",
          "300490",
          "150710",
          "950490",
          "220830"
        ],
        "notes": "soy sauce code 210390 not in label space"
      },
      {
        "text": "hand sanitizer gel 70% alcohol",
        "expected": "380894",
        "predicted": "290531",
        "confidence": 1.0,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "290531",
          "950490",
          "310520",
          "220830",
          "240120"
        ],
        "notes": "sanitizer code 380894 not in label space"
      },
      {
        "text": "drone with 4K camera",
        "expected": "880211",
        "predicted": "852580",
        "confidence": 0.6108,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "852580",
          "852872",
          "870323",
          "950490",
          "290531"
        ],
        "notes": "UAV code not in label space"
      },
      {
        "text": "solar panel 400W monocrystalline",
        "expected": "854140",
        "predicted": "850440",
        "confidence": 0.4031,
        "category": "known_failure",
        "language": "en",
        "top5": [
          "850440",
          "850760",
          "870380",
          "853400",
          "290531"
        ],
        "notes": "maps to photosensitive devices - often misclassified"
      }
    ],
    "n_failures": 16
  },
  "timing": {
    "model_load_s": 3.93,
    "benchmark_s": 1.24,
    "total_s": 6.59
  },
  "split_analysis": {
    "test_accuracy": 0.7721,
    "weighted_f1": 0.7703,
    "macro_f1": 0.8107,
    "n_train": 7863,
    "n_test": 1966,
    "worst_15_by_f1": [
      {
        "hs_code": "870332",
        "desc": "Diesel motor cars, 1500-2500cc",
        "precision": 0.2958,
        "recall": 0.2471,
        "f1": 0.2692,
        "support": 85
      },
      {
        "hs_code": "271019",
        "desc": "Other medium petroleum oils",
        "precision": 0.5,
        "recall": 0.2222,
        "f1": 0.3077,
        "support": 9
      },
      {
        "hs_code": "870323",
        "desc": "Motor cars, 1500-3000cc",
        "precision": 0.2991,
        "recall": 0.3465,
        "f1": 0.3211,
        "support": 101
      },
      {
        "hs_code": "854239",
        "desc": "Other electronic integrated circuits",
        "precision": 0.5,
        "recall": 0.25,
        "f1": 0.3333,
        "support": 12
      },
      {
        "hs_code": "870324",
        "desc": "Motor cars, >3000cc",
        "precision": 0.4839,
        "recall": 0.5263,
        "f1": 0.5042,
        "support": 57
      },
      {
        "hs_code": "890190",
        "desc": "Other cargo vessels",
        "precision": 0.4211,
        "recall": 0.6667,
        "f1": 0.5161,
        "support": 12
      },
      {
        "hs_code": "843149",
        "desc": "Other parts of cranes",
        "precision": 0.6667,
        "recall": 0.4444,
        "f1": 0.5333,
        "support": 18
      },
      {
        "hs_code": "870899",
        "desc": "Other parts for motor vehicles",
        "precision": 0.5333,
        "recall": 0.5333,
        "f1": 0.5333,
        "support": 15
      },
      {
        "hs_code": "271600",
        "desc": "Electrical energy",
        "precision": 0.6,
        "recall": 0.6,
        "f1": 0.6,
        "support": 10
      },
      {
        "hs_code": "271012",
        "desc": "Light petroleum oils",
        "precision": 0.5833,
        "recall": 0.6364,
        "f1": 0.6087,
        "support": 11
      },
      {
        "hs_code": "120190",
        "desc": "Soya beans, other",
        "precision": 0.8571,
        "recall": 0.5,
        "f1": 0.6316,
        "support": 12
      },
      {
        "hs_code": "380891",
        "desc": "Insecticides",
        "precision": 1.0,
        "recall": 0.4615,
        "f1": 0.6316,
        "support": 13
      },
      {
        "hs_code": "901890",
        "desc": "Other medical instruments",
        "precision": 0.7143,
        "recall": 0.5769,
        "f1": 0.6383,
        "support": 26
      },
      {
        "hs_code": "847330",
        "desc": "Parts and accessories for computers",
        "precision": 0.8889,
        "recall": 0.5,
        "f1": 0.64,
        "support": 16
      },
      {
        "hs_code": "940180",
        "desc": "Other seats",
        "precision": 0.6667,
        "recall": 0.6154,
        "f1": 0.64,
        "support": 13
      }
    ],
    "top_20_cross_chapter_confusions": [
      {
        "true_code": "040120",
        "pred_code": "020130",
        "true_chapter": "Dairy",
        "pred_chapter": "Meat",
        "count": 3
      },
      {
        "true_code": "840734",
        "pred_code": "870323",
        "true_chapter": "Machinery",
        "pred_chapter": "Vehicles",
        "count": 3
      },
      {
        "true_code": "901890",
        "pred_code": "843149",
        "true_chapter": "Medical",
        "pred_chapter": "Machinery",
        "count": 3
      },
      {
        "true_code": "120190",
        "pred_code": "100199",
        "true_chapter": "Oil Seeds",
        "pred_chapter": "Cereals",
        "count": 2
      },
      {
        "true_code": "200990",
        "pred_code": "190531",
        "true_chapter": "Food Preparations",
        "pred_chapter": "Food Preparations",
        "count": 2
      },
      {
        "true_code": "270900",
        "pred_code": "070200",
        "true_chapter": "Mineral Fuels",
        "pred_chapter": "Vegetables",
        "count": 2
      },
      {
        "true_code": "271012",
        "pred_code": "870323",
        "true_chapter": "Mineral Fuels",
        "pred_chapter": "Vehicles",
        "count": 2
      },
      {
        "true_code": "271019",
        "pred_code": "151190",
        "true_chapter": "Mineral Fuels",
        "pred_chapter": "Oils",
        "count": 2
      },
      {
        "true_code": "730890",
        "pred_code": "392321",
        "true_chapter": "Steel",
        "pred_chapter": "Plastics",
        "count": 2
      },
      {
        "true_code": "730890",
        "pred_code": "890190",
        "true_chapter": "Steel",
        "pred_chapter": "Ships",
        "count": 2
      },
      {
        "true_code": "840734",
        "pred_code": "870324",
        "true_chapter": "Machinery",
        "pred_chapter": "Vehicles",
        "count": 2
      },
      {
        "true_code": "843149",
        "pred_code": "392321",
        "true_chapter": "Machinery",
        "pred_chapter": "Plastics",
        "count": 2
      },
      {
        "true_code": "843149",
        "pred_code": "730890",
        "true_chapter": "Machinery",
        "pred_chapter": "Steel",
        "count": 2
      },
      {
        "true_code": "850760",
        "pred_code": "870380",
        "true_chapter": "Electronics",
        "pred_chapter": "Vehicles",
        "count": 2
      },
      {
        "true_code": "853400",
        "pred_code": "392010",
        "true_chapter": "Electronics",
        "pred_chapter": "Plastics",
        "count": 2
      },
      {
        "true_code": "870899",
        "pred_code": "842199",
        "true_chapter": "Vehicles",
        "pred_chapter": "Machinery",
        "count": 2
      },
      {
        "true_code": "901890",
        "pred_code": "870899",
        "true_chapter": "Medical",
        "pred_chapter": "Vehicles",
        "count": 2
      },
      {
        "true_code": "030617",
        "pred_code": "847170",
        "true_chapter": "Fish",
        "pred_chapter": "Electronics",
        "count": 1
      },
      {
        "true_code": "040120",
        "pred_code": "340111",
        "true_chapter": "Dairy",
        "pred_chapter": "Cosmetics",
        "count": 1
      },
      {
        "true_code": "040690",
        "pred_code": "220300",
        "true_chapter": "Dairy",
        "pred_chapter": "Beverages",
        "count": 1
      }
    ]
  }
}