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Pyyan / Compare / Claude Sonnet 4.6 vs Claude Fable 5

Claude Sonnet 4.6 vs Claude Fable 5

2 of 5

Language Models · verified 13 Aug 2026

Claude Sonnet 4.6Anthropiccurrent
Claude Fable 5Anthropiccurrent
3 slots left
SpecificationClaude Sonnet 4.6Claude Fable 5
SummaryPrevious Sonnet generation.Most capable widely released model, for the hardest reasoning and long-horizon agentic work.
Context1M1M
Input ($/Mtok)$3$10
Output ($/Mtok)$15$50
LicenceProprietaryProprietary
Max output128K128K
Model IDclaude-sonnet-4-6claude-fable-5
CategoryLanguage ModelsLanguage Models
OfficialAnthropic ↗Anthropic ↗

Highlighted rows are where these differ.

Claude Sonnet 4.6

Previous Sonnet generation.

Best for legacy pins.

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 →