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Pyyan / Compare / Claude Haiku 4.5 vs Claude Fable 5

Claude Haiku 4.5 vs Claude Fable 5

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Language Models · verified 13 Aug 2026

Claude Haiku 4.5Anthropiccurrent
Claude Fable 5Anthropiccurrent
3 slots left
SpecificationClaude Haiku 4.5Claude Fable 5
SummaryFastest and cheapest Claude tier.Most capable widely released model, for the hardest reasoning and long-horizon agentic work.
Context200K1M
Input ($/Mtok)$1$10
Output ($/Mtok)$5$50
LicenceProprietaryProprietary
Max output64K128K
Model IDclaude-haiku-4-5claude-fable-5
CategoryLanguage ModelsLanguage Models
OfficialAnthropic ↗Anthropic ↗

Highlighted rows are where these differ.

Claude Haiku 4.5

Fastest and cheapest Claude tier.

Best for classification and subagents.

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 →