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Anthropic launches Claude Fable 5.2, topping AI index amid rivalry with GPT-6 Astra

Anthropic released Claude Fable 5.2 on November 9, 2026, debuting at #1 on the Artificial Analysis Intelligence Index with a score of 65, five points above Gemini 4 Carbon, prompting comparisons with OpenAI's GPT-6 Astra and Claude Opus 5.5.

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Timeline · 6 reports

  1. 2026-11-14 17:03 · The New Stack AI
    Claude Fable 5.2 vs. Fable 5.1: Fewer refusals, with small savings on the login fix
  2. 2026-11-14 14:00 · The New Stack AI
    Claude Fable 5.2 vs. GPT-6 Astra: A lower list price didn’t mean a lower bill
  3. 2026-11-12 19:01 · r/artificial
    Will Claude Fable 5.2 and GPT-6 Astra make specialized robot models obsolete, or do robots still need their own VLAs, tactile encoders and world models?
  4. 2026-11-12 10:03 · DEV Community — AI
    Claude Fable 5.2 vs Opus 5.5: which one should you actually use?
  5. 2026-11-12 05:33 · DEV Community — AI
    Fable 5.2 vs Opus 5.5: When to Use Which
  6. 2026-11-12 05:13 · DEV Community — AI
    Claude Fable 5.2 vs GPT-6 Astra vs Gemini 4 Argon: The AI Endgame of 2026 🔥

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