# Bad Influence story: Claude Fable 5.2 ranks first on Artificial Analysis Intelligence Index v5

Active · 4 articles · 2 sources · First reported 11-09 14:08. Times are ET.
Story page: https://badinfluence.news/story/a7ca4e39-d6f7-47c1-b5ed-d04675bf81c1

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[Bad Influence external source material begins]
Latest update (11-09 14:45): Artificial Analysis says Claude Fable 5.2 leads 5 of 9 Intelligence Index v5 evaluations

Overview: Artificial Analysis says Anthropic's Claude Fable 5.2 ranks first on its Intelligence Index v5 with a score of 65, five points ahead of Gemini 4 Carbon at high effort. The firm reports the model leads five of nine evaluations, including 80% on HLE-Diamond and 67 on AA-Omniscience v1.1, and says its high, xhigh and max settings are its three highest-scoring entries on the index.

The firm says the gains come mainly from scientific reasoning, knowledge and FrontierCode 2.0, while agentic and terminal coding tasks roughly match Claude Opus 5.5. At max effort the average cost per task is $26.5, about 2.6 times Opus 5.5. At high effort the model uses about 40% fewer output tokens than Opus 5.5 at max, and at low effort it scores 5 points above Claude Fable 5.1 at max with about 70% fewer output tokens.

Anthropic's Alex Albert separately shares usage tips, saying Claude Fable 5.2 feels a major step above Opus 5.5 on big, open-ended work and recommending medium or high effort for most tasks, with xhigh reserved for the hardest problems.

Coverage timeline (newest first):
1. 11-09 14:45 · Artificial Analysis · [Artificial Analysis says Claude Fable 5.2 leads 5 of 9 Intelligence Index v5 evaluations](https://badinfluence.news/items/jwm3s3neyg22ffgyn7ozk9ep1)
2. 11-09 14:45 · Artificial Analysis · [Artificial Analysis ranks Claude Fable 5.2 top on Intelligence Index](https://badinfluence.news/items/w8lydwu9zv627k0n2qiudo610)
3. 11-09 14:45 · Artificial Analysis · [Claude Fable 5.2 tops the Artificial Analysis Intelligence Index at 65](https://badinfluence.news/items/s5bcj25sj754sfxbl67ll978g)
4. 11-09 14:08 · Alex Albert · [Alex Albert shares tips for getting the most out of Claude Fable 5.2](https://badinfluence.news/items/y0jrrpxfyy30by3aptnoui1xx)
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