{
  "schemaVersion": "bitshovel-editorial-review-v1",
  "id": "aihot-aihot-virxact-com-items-cmtj04igz04xproel00pt2oj-review-20260905",
  "signalId": "aihot-aihot-virxact-com-items-cmtj04igz04xproel00pt2oj",
  "originalUrl": "https://platform.claude.com/docs/en/release-notes/overview",
  "reviewedAt": "2026-09-05T07:10:46.661Z",
  "kind": "evidence-review",
  "note": {
    "zh": "来源核验：Simon Willison 的文章属于 Claude Fable 5.1 发布后的使用实测补充，予以保留；它不直接证明 AA 榜首或缓存读取价为输入价 2.5% 的结论，这两项应分别核对测量机构与官方说明。",
    "en": "Source review: Simon Willison’s article is a hands-on follow-up to the Claude Fable 5.1 release and remains linked. It does not directly establish the AA lead or the 2.5% cache-read price; those claims rely on the measurement source and official documentation respectively."
  },
  "evidence": [
    {
      "type": "retained-feed-entry",
      "label": {
        "zh": "Simon Willison：该版本实测背景",
        "en": "Simon Willison: release and hands-on background"
      },
      "url": "https://simonwillison.net/2026/Sep/1/claude-fable-5-1/",
      "path": "app/_content/editorial-reviews/evidence/claude-background-feed-entry.json",
      "sha256": "2b0ed607d0b706c75809b47e652ce31c3b86ae4309e1cfb606e2bb70be3eaec3",
      "bytes": 658,
      "fetchedAt": "2026-09-04T04:49:10.643Z"
    }
  ],
  "before": {
    "id": "aihot-aihot-virxact-com-items-cmtj04igz04xproel00pt2oj",
    "state": "new",
    "lane": "platformShift",
    "publishedAt": "2026-09-01T00:00:00.000Z",
    "observedAt": "2026-09-01T22:00:44.699Z",
    "originalUrl": "https://platform.claude.com/docs/en/release-notes/overview",
    "relatedSources": [
      {
        "label": {
          "zh": "AIHOT 精选（发现源）",
          "en": "AIHOT featured (discovery)"
        },
        "url": "https://aihot.virxact.com/items/cmtj04igz04xproel00pt2oju"
      },
      {
        "label": {
          "zh": "AlphaSignal",
          "en": "AlphaSignal"
        },
        "url": "https://alphasignal.ai/news/anthropic-s-claude-fable-5-1-tops-every-frontier-model-but-costs-20-more"
      },
      {
        "label": {
          "zh": "Artificial Analysis",
          "en": "Artificial Analysis"
        },
        "url": "https://artificialanalysis.ai/models/claude-fable-5-1"
      },
      {
        "label": {
          "zh": "Simon Willison 博客",
          "en": "Simon Willison's weblog"
        },
        "url": "https://simonwillison.net/2026/Sep/1/claude-fable-5-1/"
      }
    ],
    "source": {
      "zh": "Claude 官方发布说明原文，经 AIHOT 精选与 AlphaSignal 交叉进入视野",
      "en": "Official Claude release notes, surfaced via AIHOT and cross-checked with AlphaSignal"
    },
    "title": {
      "zh": "Claude Fable 5.1 发布：AA 智能指数登顶，缓存读降至输入价 2.5%",
      "en": "Claude Fable 5.1 tops the AA index; cache reads cut to 2.5% of input"
    },
    "summary": {
      "zh": "Anthropic 发布 Claude Fable 5.1——长程 agentic 编码、知识工作与研究场景的 Fable 5 继任者，同日为 Project Glasswing 参与者发布 Mythos 5.1。默认 1M token 上下文、128k 最大输出、常开自适应思维；定价 $10/$50 每 MTok 与 Fable 5 持平，提示缓存读降至 $0.25/MTok（输入价 0.025×，其余模型为 0.1×）。已上线 Claude API、Bedrock、AWS、Google Cloud、Microsoft Foundry，并登陆 OpenRouter（实价逐项核对一致）。第三方 Artificial Analysis 榜：智能指数 66、列 #1/192（Fable 5 为 62、#6）；每指数任务成本 $3.69 对 $3.14（约 +18%）。",
      "en": "Anthropic shipped Claude Fable 5.1, successor to Fable 5 for long-running agentic coding, knowledge work, and research, alongside Mythos 5.1 for Project Glasswing participants. Defaults: 1M-token context, 128k max output, always-on adaptive thinking at $10/$50 per MTok with prompt-cache reads cut to $0.25/MTok (0.025x base input versus 0.1x elsewhere). Live on Claude API, Bedrock, AWS, Google Cloud, Microsoft Foundry, and OpenRouter at matching prices. Artificial Analysis now ranks it #1 of 192 (index 66 vs 62 for Fable 5); cost per index task is $3.69 vs $3.14, about 18% higher."
    },
    "why": {
      "zh": "前沿模型对比组 Anthropic Claude 族的版本线再进一步：一次发布同时给出能力（AA 榜登顶）、成本结构（缓存读 0.025×输入价）与生态可用性（五平台+OpenRouter 同价）三组可验证事实，是 agent 成本核算的即时刻度。",
      "en": "The Anthropic Claude line advances on three verifiable axes at once — capability (AA #1), cost structure (cache reads at 0.025x of input price), and availability (five platforms plus OpenRouter at identical prices) — an immediate calibration point for agent cost math."
    },
    "caveat": {
      "zh": "证据来源为 Anthropic 官方发布说明（厂商自述口径）与 Artificial Analysis 榜单页（第三方测量，BitShovel 于 2026-09-02 抓取核对），aihot 与 AlphaSignal 双聚合器同日交叉同报。约 +18% 的每任务成本按 AA 口径 $3.69 对 $3.14 计得，略低于聚合器标题四舍五入的 20%；AA 指数不是独立评测的替代，榜单热度也不是实际适用性的证明。",
      "en": "Evidence is Anthropic's official release notes (vendor's own account) plus the Artificial Analysis leaderboard (third-party measurement, fetched and checked by BitShovel on Sep 2, 2026), cross-reported the same day by aihot and AlphaSignal. The ~18% per-task delta is computed from AA's $3.69 vs $3.14, slightly under the 20% rounding in aggregator headlines. An index rank is not a substitute for independent evaluation, and leaderboard attention is not proof of fit."
    },
    "timeline": [
      {
        "date": {
          "zh": "9 月 2 日",
          "en": "Sep 2"
        },
        "datetime": "2026-09-01T22:00:44.699Z",
        "summary": {
          "zh": "进入 BitShovel 雷达：AIHOT 精选 收录时可见 50 条。",
          "en": "Entered the BitShovel radar: 50 entries visible on AIHOT featured at collection."
        },
        "source": {
          "zh": "AIHOT 精选 快照",
          "en": "AIHOT featured snapshot"
        }
      },
      {
        "date": {
          "zh": "9 月 2 日",
          "en": "Sep 2"
        },
        "datetime": "2026-09-01T23:57:28.000Z",
        "summary": {
          "zh": "新增同题佐证：Simon Willison 博客 于本观察窗收录同一故事（标题匹配）。",
          "en": "Corroboration added: Simon Willison's weblog carried the same story this window (title match)."
        },
        "source": {
          "zh": "Simon Willison 博客",
          "en": "Simon Willison's weblog"
        },
        "kind": "corroboration-added",
        "discoveredAt": "2026-09-04T05:24:28.145Z"
      }
    ],
    "followTarget": {
      "id": "discussion:platform-claude-com-release-notes-september-1-2026",
      "label": {
        "zh": "Claude Fable 5.1 官方发布说明",
        "en": "Official Claude Fable 5.1 release notes"
      },
      "scope": {
        "zh": "Fable 系列定价、能力或 API 行为的后续官方修订，以及 Mythos 5.1 的公开扩大",
        "en": "Official revisions to Fable-series pricing, capabilities, or API behavior, plus any public widening of Mythos 5.1"
      },
      "url": "https://platform.claude.com/docs/en/release-notes/overview",
      "updateMode": "verified-change"
    },
    "ingestion": {
      "mode": "editorial",
      "adapter": "syndication-feed",
      "evidenceClass": "official-statement",
      "observationRef": "source-observations/history/syndication-feeds.2026-09-01T22-00-44Z.snapshot.json#feed:aihot-featured",
      "changeRef": "source-observations/history/syndication-feed-changes.2026-09-01T22-00-44Z.snapshot.json#feed:aihot-featured"
    },
    "managedObjectId": "model-version:claude-fable-5-1",
    "banner": {
      "url": "/card-art/anthropic-claude-fable-5-1-official.jpg",
      "credit": "Artificial Analysis",
      "license": "© Artificial Analysis - benchmark chart, editorial use with attribution"
    },
    "verifiedAt": "2026-09-04T16:00:18.920Z"
  },
  "after": {
    "why": {
      "zh": "前沿模型对比组 Anthropic Claude 族的版本线再进一步：一次发布同时给出能力（AA 榜登顶）、成本结构（缓存读 0.025×输入价）与生态可用性（五平台+OpenRouter 同价）三组可验证事实，是 agent 成本核算的即时刻度。",
      "en": "The Anthropic Claude line advances on three verifiable axes at once — capability (AA #1), cost structure (cache reads at 0.025x of input price), and availability (five platforms plus OpenRouter at identical prices) — an immediate calibration point for agent cost math."
    }
  },
  "withdrawnSources": [],
  "withdrawnTimeline": [],
  "limitations": {
    "zh": "正文已在线核对；本回执保留收录快照与原文链接，未归档文章全文。此次只审查来源关联的含义，不重新发布产品或调查结论。",
    "en": "The articles were read online; this receipt retains the feed entry and source link, not a full article archive. This review concerns the source relationship, not a new product release or investigation result."
  },
  "integrity": "0797e6981c97922d72c8f7e24f3934556f1e981aa4ea5caa9f881d21eb801dfd"
}