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Claude Fable 5.1

Anthropic's highest-priced Claude tier, positioned for demanding reasoning and long-horizon agentic work.

  • Anthropic
  • Closed
  • Released 1 Sep 2026

Official page

Where it ranks

Facts

Vendor
Anthropic
Family
Claude Fable
Released
1 Sep 2026
Weights
Closed: API and apps only
License
proprietary
API price
$10 in / $50 out per 1M tokens
Access
Paid only
Last verified
18 Oct 2026

Price from platform.claude.com, 18 Oct 2026.

Benchmark results

BenchmarkResultEntry on the leaderboardAs ofSource
Artificial Analysis Intelligence Index53Claude Fable 5.1 (Max, Default Fallback)
Raw value from the page's embedded model data; the site displays it rounded to an integer.
18 Oct 2026artificialanalysis.ai
AutomationBench-AA (Artificial Analysis)59.4%Claude Fable 5.1 (Max, Default Fallback)
AutomationBench-AA Score (share of each task's objectives completed, a task with any guardrail violation scoring zero); raw value from the page's embedded model data (displayed rounded); rank 20 of 32; Tasks Completed 32.12%, Objectives Completed 88.09%; no last-updated date shown, so as_of = retrieval date. 'Default Fallback' means Anthropic's classifier fallback to another model was left on, as in AA's default runs.
19 Oct 2026artificialanalysis.ai
Design Arena Python-PPTX Slides1,328Claude Fable 5.1
768 battles. Read from the site's own API (page renders client-side).
18 Oct 2026designarena.ai
Design Arena SVG1,300Claude Fable 5.1
Design Arena SVG, rank 11, 1326 battles; marked inactive; rows read from POST https://www.designarena.ai/api/leaderboard (arenaType 'models', category 'svg'); names from https://www.designarena.ai/api/registry
19 Oct 2026designarena.ai
EQ-Bench Creative Writing v32,162claude-fable-5-1
Elo score from the leaderboard data embedded in https://eqbench.com/creative_writing.js (file last modified 2026-09-24); rank 2 of 140; rubric score 16.95. Marked as a new entry on the board.
24 Sep 2026eqbench.com
LMArena Search Arena (style control)1,233claude-fable-5.1-high
From LMArena's official leaderboard-dataset (search_style_control, split latest, category overall, published 2026-10-13), which mirrors https://arena.ai/leaderboard/search (site blocks automated fetches). Rank 4 of 42; 12782 votes; 95% CI 1226.2-1240.5.
13 Oct 2026huggingface.co
LMArena Text Arena (overall, style control)1,502Claude Fable 5.1 (Max)
From LMArena's official leaderboard-dataset (text_style_control, split latest, category overall, published 2026-10-15), which mirrors https://arena.ai/leaderboard/text (site blocks automated fetches).
15 Oct 2026huggingface.co
LMArena Text Arena: Creative Writing (style control)1,485Claude Fable 5.1 (Max)
From LMArena's official leaderboard-dataset (text_style_control, split latest, category creative_writing, published 2026-10-15), which mirrors https://arena.ai/leaderboard/text/creative-writing (site blocks automated fetches). Rank 9 of 414; 3284 votes; 95% CI 1473.3-1496.2.
15 Oct 2026huggingface.co
LMArena Vision Arena (overall, style control)1,286claude-fable-5.1-max
From LMArena's official leaderboard-dataset (vision_style_control, split latest, category overall, published 2026-10-09), which mirrors https://arena.ai/leaderboard/vision (site blocks automated fetches). Rank 17 of 165; 4648 votes; 95% CI 1276.7-1296.1.
9 Oct 2026huggingface.co
LMArena WebDev / Code Arena (overall)1,742Claude Fable 5.1 (Max)
From LMArena's official leaderboard-dataset (webdev = Code Arena, split latest, category overall, published 2026-10-18), which mirrors https://arena.ai/leaderboard/webdev. Rank 5; 7684 votes; 95% CI 1733.4-1751.2.
18 Oct 2026huggingface.co
ParseBench (models)78.9%Anthropic Fable 5.1
Overall (mean of tables, charts, content faithfulness, semantic formatting, visual grounding) from leaderboard.csv in the ParseBench repo (last leaderboard commit 2026-10-09).
9 Oct 2026github.com
SWE-Bench Pro V2 (public set, full)99.1%Fable 5.1 (Claude Code) high
SWE-Bench Pro V2 Full (642 tasks); row added 2026-10-07; 95% CI +/-0.5; harness in the variant name; read from the leaderboard page's embedded data.
19 Oct 2026labs.scale.com

Where you can use it

Earlier versions

  • Claude Fable 5 · 9 Jun 2026

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Alternatives to Claude Fable 5.1

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