Anthropic

Claude Fable 5

9.5/10
Maker
Anthropic
Origin
United States
Released
Jun 9, 2026
Category
Language Models

Strengths & weaknesses

  • 3rd of 380 on LMArena's creative-writing arena, and 7th of 399 on hard prompts, on tens of thousands of votes
  • Built for long-horizon agentic work, with a 1M-token context and up to 128K output tokens per request
  • Anthropic released it and then temporarily suspended it in June 2026 before restoring access
  • Superseded by Fable 5.1 in September 2026 at the same $10/$50 per million tokens

Evaluation

80% of weight measured

Scored on Claude Fable 5 (High) · sources as of Sep 26, 2026

Confidence band 9.5–9.6 · a model inside this range isn’t meaningfully apart from this one

Price & availability

Measured the same way, deliberately kept out of the score: what a model costs doesn’t change what it can do.

w = weight, each criterion’s share of the overall score. Missing marks don’t count for or against. How scoring works

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9.4/10
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  • 2.4T mixture-of-experts with about 95B active and a 1M-token context, at $2/$6 per million tokens
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  • Served by a single provider on OpenRouter, so there is no fallback if it is unavailable