{
  "api_version": "1",
  "updated": "2026-10-23",
  "latest_event": "2026-10-22",
  "rights": "© Frontier Log, all rights reserved.",
  "event": {
    "slug": "2026-06-30-longcat-2-0",
    "date": "2026-06-30",
    "provider": "meituan",
    "kind": "model",
    "importance": "major",
    "title": "LongCat-2.0",
    "detail": "1.6T-parameter MoE model, ~48B active, with 1M context, trained and served on AI ASIC superpods.",
    "tags": [
      "open-weights"
    ],
    "related": [],
    "source": "https://longcat.chat/blog/longcat-2.0/",
    "source_title": "Introducing LongCat-2.0",
    "source_archived": null,
    "source_http_status": null,
    "followups": [
      {
        "text": "Weights released on Hugging Face",
        "status": "kept",
        "promise": "We are introducing and open sourcing LongCat-2.0, a large-scale MoE language model with 1.6 trillion total parameters and ~48 billion activated per token — a substantial step up from previous LongCat models, accompanied by several architectural improvements.",
        "date": "2026-07-12",
        "source": "https://tech.meituan.com/2026/07/12/LongCat-2.0-Open-source.html"
      }
    ],
    "revealed_as": null,
    "stealth_previews": [
      "2026-04-28-owl-alpha"
    ],
    "reveal_source": null,
    "url": "https://frontierlog.ai/event/2026-06-30-longcat-2-0",
    "image": "https://frontierlog.ai/og/2026-06-30-longcat-2-0.png",
    "models": [
      {
        "slug": "longcat-2-0",
        "name": "LongCat-2.0",
        "lab": "meituan",
        "date": "2026-06-30",
        "flagship": false,
        "event": "https://frontierlog.ai/event/2026-06-30-longcat-2-0",
        "releases": [],
        "results": [
          {
            "id": "longcat-2-0:terminal-bench-2-1:default:1",
            "model": "longcat-2-0",
            "model_name": "LongCat-2.0",
            "model_date": "2026-06-30",
            "event": "https://frontierlog.ai/event/2026-06-30-longcat-2-0",
            "benchmark": "terminal-bench-2-1",
            "benchmark_name": "Terminal-Bench 2.1",
            "setting": "default",
            "setting_name": "",
            "score": 70.8,
            "unit": "%",
            "printed": "70.8",
            "reported_by": "meituan",
            "label": "LongCat-2.0",
            "source": "https://longcat.chat/blog/longcat-2.0/",
            "source_title": "Introducing LongCat-2.0",
            "source_date": "2026-06-30",
            "where": "'Evaluations' section table (rendered by the page's script; load it in a browser), row 'Terminal-Bench 2.1' under 'CODE AGENT', column 'LongCat-2.0'",
            "own": true,
            "primary": true,
            "parallel": false,
            "notes": "Claude Code harness; 6-hour agent timeout",
            "caveat": "",
            "human_verified": true,
            "human_verified_on": "2026-10-23",
            "check": "human",
            "corroborated": true,
            "corroborated_on": "2026-10-23",
            "corroborated_by": [
              {
                "url": "https://huggingface.co/meituan-longcat/LongCat-2.0",
                "name": "LongCat-2.0 card",
                "title": "LongCat-2.0 model card (Hugging Face)",
                "lab": "meituan",
                "date": "2026-06-30",
                "printed": "70.8",
                "where": "Evaluation Results table, Code Agent section, row 'Terminal-Bench 2.1', column 'LongCat-2.0' (cards say only 'measured in-house under a unified harness'; per-row harness/timeout not stated; card intro names Claude Code among supported harnesses)"
              },
              {
                "url": "https://github.com/meituan-longcat/LongCat-2.0",
                "name": "LongCat-2.0 card",
                "title": "LongCat-2.0 README (GitHub)",
                "lab": "meituan",
                "date": "2026-06-30",
                "printed": "70.8",
                "where": "README Evaluation Results table, Code Agent section, row 'Terminal-Bench 2.1', column 'LongCat-2.0' (cards say only 'measured in-house under a unified harness'; per-row harness/timeout not stated; card intro names Claude Code among supported harnesses)"
              }
            ],
            "source_capture": "https://frontierlog.ai/captures/958070cf1766c220.png"
          },
          {
            "id": "longcat-2-0:swe-bench-pro:default:1",
            "model": "longcat-2-0",
            "model_name": "LongCat-2.0",
            "model_date": "2026-06-30",
            "event": "https://frontierlog.ai/event/2026-06-30-longcat-2-0",
            "benchmark": "swe-bench-pro",
            "benchmark_name": "SWE-bench Pro",
            "setting": "default",
            "setting_name": "",
            "score": 59.5,
            "unit": "%",
            "printed": "59.5",
            "reported_by": "meituan",
            "label": "LongCat-2.0",
            "source": "https://longcat.chat/blog/longcat-2.0/",
            "source_title": "Introducing LongCat-2.0",
            "source_date": "2026-06-30",
            "where": "'Evaluations' section table (rendered by the page's script; load it in a browser), row 'SWE-bench Pro' under 'CODE AGENT', column 'LongCat-2.0'",
            "own": true,
            "primary": true,
            "parallel": false,
            "notes": "Claude Code harness",
            "caveat": "Run on the lab's own corrected version of the public set",
            "human_verified": true,
            "human_verified_on": "2026-10-23",
            "check": "human",
            "corroborated": true,
            "corroborated_on": "2026-10-23",
            "corroborated_by": [
              {
                "url": "https://huggingface.co/meituan-longcat/LongCat-2.0",
                "name": "LongCat-2.0 card",
                "title": "LongCat-2.0 model card (Hugging Face)",
                "lab": "meituan",
                "date": "2026-06-30",
                "printed": "59.5",
                "where": "Evaluation Results table, Code Agent section, row 'SWE-bench Pro', column 'LongCat-2.0' (cards say only 'measured in-house under a unified harness'; per-row harness/timeout not stated; card intro names Claude Code among supported harnesses)"
              },
              {
                "url": "https://github.com/meituan-longcat/LongCat-2.0",
                "name": "LongCat-2.0 card",
                "title": "LongCat-2.0 README (GitHub)",
                "lab": "meituan",
                "date": "2026-06-30",
                "printed": "59.5",
                "where": "README Evaluation Results table, Code Agent section, row 'SWE-bench Pro', column 'LongCat-2.0' (cards say only 'measured in-house under a unified harness'; per-row harness/timeout not stated; card intro names Claude Code among supported harnesses)"
              }
            ],
            "source_capture": "https://frontierlog.ai/captures/958070cf1766c220.png"
          },
          {
            "id": "longcat-2-0:browsecomp:default:1",
            "model": "longcat-2-0",
            "model_name": "LongCat-2.0",
            "model_date": "2026-06-30",
            "event": "https://frontierlog.ai/event/2026-06-30-longcat-2-0",
            "benchmark": "browsecomp",
            "benchmark_name": "BrowseComp",
            "setting": "default",
            "setting_name": "",
            "score": 79.9,
            "unit": "%",
            "printed": "79.9",
            "reported_by": "meituan",
            "label": "LongCat-2.0",
            "source": "https://longcat.chat/blog/longcat-2.0/",
            "source_title": "Introducing LongCat-2.0",
            "source_date": "2026-06-30",
            "where": "'Evaluations' section table (rendered by the page's script; load it in a browser), row 'BrowseComp' under 'GENERAL AGENT', column 'LongCat-2.0'",
            "own": true,
            "primary": true,
            "parallel": false,
            "notes": "in-house harness; context management not stated",
            "caveat": "",
            "human_verified": true,
            "human_verified_on": "2026-10-23",
            "check": "human",
            "corroborated": true,
            "corroborated_on": "2026-10-23",
            "corroborated_by": [
              {
                "url": "https://huggingface.co/meituan-longcat/LongCat-2.0",
                "name": "LongCat-2.0 card",
                "title": "LongCat-2.0 model card (Hugging Face)",
                "lab": "meituan",
                "date": "2026-06-30",
                "printed": "79.9",
                "where": "Evaluation Results table, General Agent section, row 'BrowseComp', column 'LongCat-2.0' (cards say only 'measured in-house under a unified harness'; per-row harness/timeout not stated; card intro names Claude Code among supported harnesses)"
              },
              {
                "url": "https://github.com/meituan-longcat/LongCat-2.0",
                "name": "LongCat-2.0 card",
                "title": "LongCat-2.0 README (GitHub)",
                "lab": "meituan",
                "date": "2026-06-30",
                "printed": "79.9",
                "where": "README Evaluation Results table, General Agent section, row 'BrowseComp', column 'LongCat-2.0' (cards say only 'measured in-house under a unified harness'; per-row harness/timeout not stated; card intro names Claude Code among supported harnesses)"
              }
            ],
            "source_capture": "https://frontierlog.ai/captures/958070cf1766c220.png"
          },
          {
            "id": "longcat-2-0:gpqa-diamond:default:1",
            "model": "longcat-2-0",
            "model_name": "LongCat-2.0",
            "model_date": "2026-06-30",
            "event": "https://frontierlog.ai/event/2026-06-30-longcat-2-0",
            "benchmark": "gpqa-diamond",
            "benchmark_name": "GPQA Diamond",
            "setting": "default",
            "setting_name": "",
            "score": 88.9,
            "unit": "%",
            "printed": "88.9",
            "reported_by": "meituan",
            "label": "LongCat-2.0",
            "source": "https://longcat.chat/blog/longcat-2.0/",
            "source_title": "Introducing LongCat-2.0",
            "source_date": "2026-06-30",
            "where": "'Evaluations' section table (rendered by the page's script; load it in a browser), row 'GPQA-diamond' under 'FOUNDATIONAL', column 'LongCat-2.0'",
            "own": true,
            "primary": true,
            "parallel": false,
            "notes": "",
            "caveat": "",
            "human_verified": true,
            "human_verified_on": "2026-10-23",
            "check": "human",
            "corroborated": true,
            "corroborated_on": "2026-10-23",
            "corroborated_by": [
              {
                "url": "https://huggingface.co/meituan-longcat/LongCat-2.0",
                "name": "LongCat-2.0 card",
                "title": "LongCat-2.0 model card (Hugging Face)",
                "lab": "meituan",
                "date": "2026-06-30",
                "printed": "88.9",
                "where": "Evaluation Results table, Foundational section, row 'GPQA-diamond', column 'LongCat-2.0'"
              },
              {
                "url": "https://github.com/meituan-longcat/LongCat-2.0",
                "name": "LongCat-2.0 card",
                "title": "LongCat-2.0 README (GitHub)",
                "lab": "meituan",
                "date": "2026-06-30",
                "printed": "88.9",
                "where": "README Evaluation Results table, Foundational section, row 'GPQA-diamond', column 'LongCat-2.0'"
              }
            ],
            "source_capture": "https://frontierlog.ai/captures/958070cf1766c220.png"
          }
        ]
      }
    ],
    "stories": []
  }
}
