Claude Haiku 5.5

What it is

Anthropic's launch page for Claude Haiku 5.5, dated October 7, 2026. Anthropic describes it as its cheapest and fastest small model, lists API prices of $0.10 per million input tokens and $0.50 per million output tokens for prompts up to 100k tokens, and says this is about 75% lower on average than Haiku 4.5.

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