{
  "id": 6594809,
  "title": "Fable 5.1 vs. Fable 5: Results on a real-world budget, not the spec sheet",
  "url": "https://urgent.news/2026/09/10/fable-5-1-vs-fable-5-results-on-a-real-world-budget-not-the-spec-sheet",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-10T14:00:00.000Z",
  "source": {
    "name": "The New Stack",
    "slug": "the-new-stack",
    "url": "https://thenewstack.io/claude-fable-benchmark-budget/"
  },
  "original_language": "en",
  "account": "When Anthropic introduced Claude Fable 5.1 recently, they emphasized a single benchmark result: its Terminal-Bench-Science score. Fable 5.1 achieved 52.6%, while Fable 5 scored 24.7%, more than doubling the latter model. However, Anthropic's conditions for the benchmark score aren't accessible to most users. When tested by the benchmark's leaderboard, Fable 5 achieved 21.4%, and Fable 5.1 wasn't on the independent leaderboard. I decided to run the benchmark's tasks as a regular user would, focusing on tasks from various scientific fields. The benchmark offers five categories, each with multiple tests. I selected one test per category that could run in a Python environment to compare the models' performance.",
  "summary": "When Anthropic launched Claude Fable 5.1 this month, it centered the announcement around one benchmark result: its Terminal-Bench-Science score. In The post Fable 5.1 vs. Fable 5: Results on a real-world budget, not the spec sheet appeared first on The New Stack .",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "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."
}