Pyyan / Compare / Claude Haiku 5.5 vs Claude Fable 5

Claude Haiku 5.5 vs Claude Fable 5

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Language Models · verified 10 Oct 2026

Claude Haiku 5.5Anthropiccurrent
Claude Fable 5Anthropiccurrent
3 slots left
SpecificationClaude Haiku 5.5Claude Fable 5
SummaryA tenth of Haiku 4.5's price, and it finishes terminal tasks Haiku 4.5 could not start.Most capable widely released model, for the hardest reasoning and long-horizon agentic work.
ContextNot published1M
Input ($/Mtok)$0.1$10
Output ($/Mtok)$0.5$50
LicenceProprietaryProprietary
Max outputNot published128K
ParametersNot published—
Released7 Oct 2026—
Model IDclaude-haiku-5-5claude-fable-5
CategoryLanguage ModelsLanguage Models
OfficialAnthropic ↗Anthropic ↗

Highlighted rows are where these differ.

Claude Haiku 5.5

  • 39.2% on Terminal-Bench 4.0, where Haiku 4.5 scored 0.0%
  • Above 100K tokens the price rises to $0.50 and $2.50, for the whole request
  • First Haiku with an adjustable effort setting, and a new tokenizer that spends slightly more tokens

Best for high volume work at the bottom of the stack.

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 →