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Anthropic's Claude Fable 5.2, released 9 November 2026, ranks first of 239 tracked models on Epoch AI's Capabilities Index, with a score of 174, ahead of 169 for both OpenAI's GPT-6 Astra and Claude Opus 5.5
Verified 2026-11-10
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The top spot in AI capability rankings keeps changing hands within weeks, so no single lab can count on staying ahead for long.
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