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Anthropic · model release

Claude Haiku 5.5

Anthropic releases Haiku 5.5, its cheapest and fastest small model.

In detail

Anthropic released Claude Haiku 5.5, which it called its cheapest, fastest and most capable small model, for high-volume and cost-sensitive work. It said it costs around 75% less to run than Haiku 4.5 on average.

Sources

  1. Introducing Claude Haiku 5.5 · Anthropic · Primary source
  2. Claude Developer Platform release notes · Anthropic · Primary source

Last checked 11 November 2026.

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