{
  "name": "Winoground",
  "release_date": "2026-07-07",
  "subsets": {
    "main": {
      "language": [
        "en"
      ],
      "modalities": [
        "single_image_start"
      ],
      "task_type": "yes_no_qa",
      "score_pipeline": [
        "exact-match",
        "rule-match"
      ],
      "score_protocol": {
        "reference": "Official Winoground defines text/image/group scores over ITM score comparisons for contrastive models (Thrush et al. 2022, §4, eqs. 1-3); no official generative protocol exists — probes graded by deterministic yes/no match.",
        "note": "GENERATIVE ADAPTATION: official Winoground text/image/group scores are defined over ITM score preferences and cannot be computed from generative outputs. This copy ships 4 balanced yes/no probes per example (image_i x caption_j, gt Yes iff i==j; group_id preserved). A group-score analog = all 4 probes of a group_id correct. Do not compare accuracies to official Winoground scores."
      },
      "prompt_template": "<image>{{ question }}",
      "prompt_template_source": {
        "origin": "fallback",
        "reference": "T2",
        "notes": "Tier 5: no official generative prompt exists (Winoground is a contrastive ITM benchmark, paper §4; no VLMEvalKit/lmms-eval task). Bare-question fallback; the probe question carries the Yes/No instruction."
      },
      "mapping_from_source": {
        "media": {
          "from": "image",
          "type": "list",
          "min_items": 1,
          "max_items": 1
        },
        "id": {
          "from": "id"
        },
        "question": {
          "from": "question"
        },
        "answer": {
          "from": "answer",
          "optional": true
        },
        "extra": {
          "group_id": {
            "from": "group_id"
          },
          "image_index": {
            "from": "image_index"
          },
          "caption_index": {
            "from": "caption_index"
          },
          "caption_0": {
            "from": "caption_0"
          },
          "caption_1": {
            "from": "caption_1"
          },
          "tag": {
            "from": "tag"
          },
          "secondary_tag": {
            "from": "secondary_tag"
          },
          "collapsed_tag": {
            "from": "collapsed_tag"
          },
          "num_main_preds": {
            "from": "num_main_preds"
          }
        },
        "source": {
          "format": "json",
          "url": {
            "test": "https://huggingface.co/datasets/facebook/winoground"
          }
        }
      }
    }
  }
}