{
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 "sha": "c82ffc020d8a",
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  "date": "2026-11-09",
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  "size": "未披露（官方页没有给参数量和架构）；与 Mythos 5.2 是同一个底座模型",
  "avail": "向所有用户开放：Claude 的付费套餐、Claude Platform（API 型号 claude-fable-5-2）、Amazon Web Services、Google Cloud、Microsoft Azure；标准价每百万 token 输入 $8、输出 $40（上一版 $10 / $50），可选快速模式 $16 / $80，输出最快约 2.5 倍",
  "license_full": "专有",
  "facts": [
   "官方页：Fable 与 Mythos 是同一个底座模型，Fable 带网络安全和生物方面的安全分类器、向所有人开放（官方页）",
   "FrontierCode 2.0（看模型的代码改动会不会被开源项目维护者合并）：Xhigh 档 49.1%，Opus 5.5 为 45.5%、GPT-6 Astra 为 42.8%；High 档 45.3%、成本约为 Opus 5.5 最高分的一半（厂商自述）",
   "训练时有意限制了最直接加速 AI 研发的几项能力，官方页写加速器内核优化和大模型架构改进这两项约在 Opus 5.5 的水平，agentic coding、硬件开发等不受影响（厂商自述，系统卡 2.3 节另有 METR 对一个更强快照的测试）",
   "第三方：Artificial Analysis 的 Intelligence Index v5 上 65 分居首，Gemini 4 Carbon 60、Opus 5.5 59（据 The Decoder 转述）；其余多数数字是 Anthropic 自己的表（厂商自述）"
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    "kind": "media"
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  "degree": 0.0008
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