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IFAI

Claude Fable 5.1

AnthropicClosedReleased Sep 1, 2026

Rank on Intelligence, week by week

Its best rank each week
Aug 24Not on the board
Aug 31Not on the board
Sep 7#1
Sep 14#1
Sep 21#1
Sep 28#4
Oct 5#5
Oct 12#5
Oct 19#6
Oct 26#7
Nov 2#18
Nov 9#23

Scores by variant

Reasoning efforts and resolutions of the same model are ranked separately.

Intelligence · Intelligence Index
  • Claude Fable 5.1 (Xhigh, Default Fallback)#2350.0
  • Claude Fable 5.1 (Max, Default Fallback)#2549.2
  • Claude Fable 5.1 (High, Default Fallback)#2747.2
  • Claude Fable 5.1 (Medium, Default Fallback)#3543.2
  • Claude Fable 5.1 (Low, Default Fallback)#3938.7

In the news: Claude Fable 5.1

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