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Pyyan / Compare / Grok 4.3 vs Claude Fable 5

Grok 4.3 vs Claude Fable 5

2 of 5

Language Models · verified 13 Aug 2026

Grok 4.3xAIcurrent
Claude Fable 5Anthropiccurrent
3 slots left
SpecificationGrok 4.3Claude Fable 5
SummaryCheapest long-context option in the family.Most capable widely released model, for the hardest reasoning and long-horizon agentic work.
Context1M1M
Input ($/Mtok)$1.25$10
Output ($/Mtok)$2.5$50
LicenceProprietaryProprietary
Max output—128K
Model IDgrok-4.3claude-fable-5
CategoryLanguage ModelsLanguage Models
OfficialxAI ↗Anthropic ↗

Highlighted rows are where these differ.

Grok 4.3

  • Retired model IDs now redirect here
  • Half the price of Grok 4.5/4.6

Best for long context on a budget.

Full spec sheet →

Claude Fable 5

  • Thinking is always on — the `thinking` param is rejected
  • Raw chain of thought is never returned
  • Requires 30-day data retention; unavailable under ZDR

Best for the hardest problems.

Full spec sheet →