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Claude Haiku 5.5

A tenth of Haiku 4.5's price, and it finishes terminal tasks Haiku 4.5 could not start.

currentAnthropic ↗Verified 2026-10-10

$0.10

per M input

Specifications

ContextNot publishedsource · as of 2026-10-10
Input ($/Mtok)$0.1source · as of 2026-10-10
Output ($/Mtok)$0.5source · as of 2026-10-10
LicenceProprietarysource · as of 2026-10-10
Max outputNot publishedsource · as of 2026-10-10
ParametersNot publishedsource · as of 2026-10-10
Released7 Oct 2026source · as of 2026-10-10
Model IDclaude-haiku-5-5source · as of 2026-10-10

Official links

Claude Haiku 5.5 model pageAnthropic official site

What matters

  • 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.

Compare with

All 5 side by side →

Claude Haiku 5.5 vs GPT-6 Astra →Claude Haiku 5.5 vs Claude Fable 5.1 →Claude Haiku 5.5 vs Claude Fable 5 →Claude Haiku 5.5 vs Claude Opus 5.5 →Claude Haiku 5.5 vs GPT-6.1 Sol →

Also in Language Models

GPT-6 Astra · OpenAIClaude Fable 5.1 · AnthropicClaude Fable 5 · AnthropicClaude Opus 5.5 · AnthropicGPT-6.1 Sol · OpenAI