Anthropic

Claude Fable 5.1

anthropic/claude-fable-5.1

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Specification

Published by the vendor; the platform bills at the target's declared price.

Claude Fable 5.1

reasoning tools

Anthropic anthropic/claude-fable-5.1

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

Input $/1M: $10.0
Output $/1M: $50.0
Context: 1M
Max output: 128K
Released: Sep 1, 2026
Modalities: textimagefile

Intelligence index57

Coding index82

Agentic index58

Cached input reads $0.25 per 1M

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targets.yamlyaml

# targets.yaml - declare a target that runs Claude Fable 5.1
targets:
  - id: claude-fable-5-1
    kind: llm
    name: Claude Fable 5.1
    metadata:
      model: anthropic/claude-fable-5.1          # links the target to this catalogue entry
    capabilities:
      domains: [general]
      supports_tools: true
      context_window: 1000000
    cost:
      usd_per_1k_tokens: 0.030000

Price among Anthropic models

Input list price per million tokens; Claude Fable 5.1 is the 11th cheapest of 13 listed.

More from Anthropic

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