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Pyyan / Compare / Grok 4.7 vs Claude Fable 5.1

Grok 4.7 vs Claude Fable 5.1

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Language Models · verified 29 Sept 2026

Grok 4.7xAIcurrent
Claude Fable 5.1Anthropiccurrent
3 slots left
SpecificationGrok 4.7Claude Fable 5.1
SummarySame price as 4.6, and nearly double its terminal score.Same price as Fable 5, and cache reads cost a quarter of what they did.
Context500K1M
Input ($/Mtok)$2$10
Output ($/Mtok)$6$50
LicenceProprietaryProprietary
Max outputNot published128K
ParametersNot publishedNot published
Released21 Sep 20261 Sep 2026
Model IDgrok-4.7claude-fable-5-1
CategoryLanguage ModelsLanguage Models
OfficialxAI ↗—

Highlighted rows are where these differ.

Grok 4.7

  • 38.0% on Terminal-Bench 4.0, up from 20.3% for Grok 4.6
  • Above 200K tokens the price doubles to $4 in and $12 out
  • Text and images in, 500K context, cached input at $0.50

Best for long context at low cost.

Full spec sheet →

Claude Fable 5.1

  • Matches or beats Fable 5 at low and medium effort, and pulls clear at high effort
  • Cache reads cut to 25% of the old price, so re-reading a long context got much cheaper
  • Identical model to Mythos 5.1 underneath; the difference is the safeguards

Best for coding and long-running work.

Full spec sheet →