# Artificial Analysis says Claude Fable 5.2 leads 5 of 9 Intelligence Index v5 evaluations

> Original title: Claude Fable 5.2 leads 5 of the 9 evaluations in Intelligence Index v5, spanning science, knowledge and coding

- Source: Artificial Analysis
- Published: 2026-11-09T19:45:13.000Z
- Bad Influence: https://badinfluence.news/items/jwm3s3neyg22ffgyn7ozk9ep1
- Original: https://x.com/ArtificialAnlys/status/2119879000713724390

## Summary

Artificial Analysis reports that Claude Fable 5.2 leads five of the nine evaluations in Intelligence Index v5, spanning science, knowledge and coding. It scores 80% on HLE-Diamond, 11 points ahead of Gemini 4 Carbon, and 67 on AA-Omniscience v1.1, 13 points ahead of Gemini 4 Carbon. The post also reports 73% on Terminal-Bench-Science and 49% on FrontierCode 2.0, a private code evaluation by Cognition.

## Post

Claude Fable 5.2 leads 5 of the 9 evaluations in Intelligence Index v5, spanning science, knowledge and coding

On HLE-Diamond it scores 80%, 11 points ahead of Gemini 4 Carbon. The gain is largest on knowledge questions (75% vs 59% for Carbon), against reasoning (86% vs 80%).

On AA-Omniscience v1.1 it scores 67, 13 points ahead of Gemini 4 Carbon and 19 ahead of Opus 5.5.

On Terminal-Bench-Science it scores 73%, 8 points ahead of Gemini 4 Carbon, and on the CritPt v2 hard subset 77%, 5 points ahead of GPT-6 Astra.

On FrontierCode 2.0, @cognition's private evaluation for code that maintainers would actually merge, it scores 49%, 3 points ahead of Opus 5.5 (max). High effort scores the same as max (49%).

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