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On October 22, 2026, Artificial Analysis published the AA-PersonalityBench evaluation results. The results show that Anthropic models lead overall in the two categories of information density and literary quality. The highest information density score is Claude Fable 5.1 (100), followed by Claude Opus 5.5 (97), Claude Sonnet 5.5 (95) and Claude Haiku 5.5 (92); the best literary quality is Claude Haiku 5.5 (100), followed by Claude Opus 5.5 (97) and Claude Fable 5.1 (95). Currently these results are published by Artificial Analysis, and there are no subsequent developments.
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Oct 22
Artificial Analysis
AA-PersonalityBench: Anthropic models lead in information density and literary quality
Results from Artificial Analysis's AA-PersonalityBench show that Anthropic models are overall ahead in the two categories of information density and literary quality. The highest in information density are Claude Fable 5.1 (100), Claude Opus 5.5 (97), Claude Sonnet 5.5 (95), and Claude Haiku 5.5 (92); the best in literary quality are Claude Haiku 5.5 (100), Claude Opus 5.5 (97), and Claude Fable 5.1 (95).