{
  "id": 5033483,
  "title": "Anthropic releases Claude Fable 5.1, cuts cached token pricing by 75%",
  "url": "https://urgent.news/2026/09/02/anthropic-releases-claude-fable-5-1-cuts-cached-token-pricing-by-75",
  "topic": "ai",
  "section": "AI",
  "published": "2026-09-02T06:07:00.000Z",
  "source": {
    "name": "TechSpot",
    "slug": "techspot",
    "url": "https://www.techspot.com/news/113701-anthropic-releases-claude-fable-51-stronger-coding-science.html"
  },
  "original_language": "en",
  "account": "Anthropic has introduced Claude Fable 5.1, the latest version of their flagship model, alongside a more restricted edition called Mythos 5.1. Both updates are available via API, cloud platforms, and the Claude desktop app, making their most advanced models more accessible for complex tasks requiring time, sensitive data, and clear safeguards. Fable 5.1 is the broadly available version, with built-in safety measures that block some high-risk work in cybersecurity and scientific research. Mythos 5.1 has fewer restrictions but requires access through Anthropic's trusted-access program. The main focus is on handling larger assignments, such as software projects, code reviews, troubleshooting, and multistep scientific work. Anthropic reports significant improvements in various evaluations, including a 55.8% score on Terminal-Bench 4.0 for coding tasks, compared to 42% for the previous version. Mythos 5.1 scores 60.9% under more permissive safety settings, and excels in scientific research with a 52.6% score, more than double the previous version's 24.7%. The company also lowered the price of cached token reads by 75%, from $1 to $0.25 per million tokens, which can significantly reduce costs for agentic workloads that frequently reuse the same information.",
  "summary": "Fable 5.1 is the broadly available version, with safeguards that block some high-risk work in cybersecurity and scientific research. Mythos 5.1 has fewer of those restrictions, but access is limited to Anthropic's trusted-access program. Read Entire Article",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 10,
    "also_reported_by": [
      {
        "outlet": "Tom's Guide",
        "title": "Anthropic just made a staggering $35 billion bet on Claude — here's why it needs so much computing power",
        "url": "https://urgent.news/2026/09/01/anthropic-just-made-a-staggering-35-billion-bet-on-claude-heres-why",
        "published": "2026-09-01T13:16:44.000Z"
      },
      {
        "outlet": "9to5Mac",
        "title": "Anthropic upgrades Claude with new Fable 5.1 model, details here",
        "url": "https://urgent.news/2026/09/01/anthropic-upgrades-claude-with-new-fable-5-1-model-details-here",
        "published": "2026-09-01T18:10:16.000Z"
      },
      {
        "outlet": "Techmeme",
        "title": "Anthropic unveils Claude Fable 5.1, which is generally available, and Mythos 5.1, for trusted partners and with cybersecurity and life sciences safeguards (Anthropic)",
        "url": "https://urgent.news/2026/09/01/anthropic-unveils-claude-fable-5-1-which-is-generally-available-and",
        "published": "2026-09-01T18:23:45.000Z"
      },
      {
        "outlet": "VentureBeat",
        "title": "Anthropic's Claude Fable 5.1 and Mythos 5.1 arrive with a 75% cost reduction for Fable cache reads",
        "url": "https://urgent.news/2026/09/01/anthropics-claude-fable-5-1-and-mythos-5-1-arrive-with-a-75-cost",
        "published": "2026-09-01T18:41:21.000Z"
      },
      {
        "outlet": "SiliconANGLE",
        "title": "Anthropic launches Claude Fable 5.1 after inking $35B cloud deal with Lambda",
        "url": "https://urgent.news/2026/09/01/anthropic-launches-claude-fable-5-1-after-inking-35b-cloud-deal-with",
        "published": "2026-09-01T20:50:53.000Z"
      },
      {
        "outlet": "Techmeme",
        "title": "Claude Fable 5.1 and Mythos 5.1 are Anthropic's first models to watermark text outputs; a detection API is available to eligible groups as required under EU law (Ben Patterson/PCWorld)",
        "url": "https://urgent.news/2026/09/01/claude-fable-5-1-and-mythos-5-1-are-anthropics-first-models-to",
        "published": "2026-09-01T20:55:02.000Z"
      },
      {
        "outlet": "Slashdot",
        "title": "Anthropic's Claude Fable 5.1 and Mythos 5.1 Arrive With a 75% Cost Reduction For Fable Cache Reads",
        "url": "https://urgent.news/2026/09/01/anthropics-claude-fable-5-1-and-mythos-5-1-arrive-with-a-75-cost-4942785",
        "published": "2026-09-01T21:00:00.000Z"
      },
      {
        "outlet": "The Verge",
        "title": "Anthropic launches Claude Fable 5.1 and says it’s up to 45 percent cheaper for agentic work",
        "url": "https://urgent.news/2026/09/01/anthropic-launches-claude-fable-5-1-and-says-its-up-to-45-percent",
        "published": "2026-09-01T22:01:36.000Z"
      },
      {
        "outlet": "Economic Times Tech",
        "title": "Anthropic unveils Claude Fable 5.1 and Mythos 5.1 for coding and knowledge work",
        "url": "https://urgent.news/2026/09/02/anthropic-unveils-claude-fable-5-1-and-mythos-5-1-for-coding-and",
        "published": "2026-09-02T04:42:59.000Z"
      }
    ]
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}