{
  "engine": "onnx",
  "family": "arbiter",
  "layout": "arbiter-fixed-v1",
  "upstream": {
    "repo": "hiteshluke/arbiter-4b",
    "revision": "0c44271c59f89758e3cae17b032e98a9140093e9",
    "base": "unsloth/gemma-3-4b-it",
    "base_revision": "bf46152c47f5dd20b896357cb51abc4c03b8ee8c",
    "code": {
      "repo": "https://github.com/CodekinsTech/arbiter",
      "commit": "e1cb30fd3019cf91d2631a2d1004abd858b8e4fa",
      "script": "training_v3_6/train.py"
    },
    "lora": {
      "r": 16,
      "alpha": 32,
      "scaling": 2.0,
      "merged": false
    }
  },
  "contract": {
    "inputs": {
      "input_ids": {
        "dtype": "int64",
        "shape": [
          "rows",
          "seq"
        ],
        "note": "one row per question; seq a multiple of 64; right-pad with any id (pad)"
      },
      "last_pos": {
        "dtype": "int64",
        "shape": [
          "rows"
        ],
        "note": "position of the row's last token"
      }
    },
    "outputs": {
      "scores": {
        "dtype": "float32",
        "shape": [
          "rows",
          24
        ],
        "note": "raw scores of the head's 24 slots; a question's option logits are the scores at its slots"
      }
    },
    "seq_multiple": 64,
    "positions": "0..seq-1, implicit",
    "attention": "causal (sliding layers: the last 1024 positions); no mask input"
  },
  "max_row_tokens": 8192,
  "special_tokens": {
    "bos": 2,
    "pad": 0
  },
  "num_slots": 24,
  "slots": {
    "noul": [
      1,
      0
    ],
    "choice": [
      2,
      3,
      4,
      5,
      6,
      7,
      8,
      9,
      10,
      11,
      12,
      13,
      14,
      15,
      16,
      17
    ],
    "score": [
      18,
      19,
      20,
      21,
      22,
      23
    ]
  },
  "max_options": 16,
  "score_levels": 6,
  "verbalizers": [
    "T",
    "F",
    "A",
    "B",
    "C",
    "D",
    "E",
    "F",
    "G",
    "H",
    "I",
    "J",
    "K",
    "L",
    "M",
    "N",
    "O",
    "P",
    "0",
    "1",
    "2",
    "3",
    "4",
    "5"
  ],
  "templates": {
    "row": "[bos] tok(\"State: {render(state)}\\n\\nQuestion: {render(instructions)}\\n\\nOptions:\\n{block}\\n\\nAnswer:\"); the head is read at the last token",
    "noul_block": "T. Yes / True\nF. No / False",
    "choice_block": "{letter}. {option}, one line per option, letters A..P",
    "choice_option": "{name} | {name}: {render(description)}",
    "score_block": "0\n1\n2\n3\n4\n5",
    "render": "None->'', scalars->Python str(), list->'- item' lines, dict->'key: value' lines, 2-space nesting",
    "add_special_tokens": false
  },
  "option_logits": {
    "noul": "scores[row, [1, 0]] (false = F, true = T)",
    "choice": "scores[row, 2 + j] for option j < 16",
    "score": "scores[row, 18 + level] for level < 6"
  },
  "opset": 20,
  "precision": "fp32 compute; base weights and head BF16, widened by Cast (at load, or per forward pass with weights_in_memory bf16); adapter F32",
  "weights_in_memory": "bf16"
}