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Claude Haiku 5.5

Simon Willison 07 October 2026 2d ago
Claude Haiku 5.5
59
Relevance
3/25
Freshness
17/25
Authority
18/20
Brand Signal
15/15
Depth
6/15
Relevance Freshness Authority Brand Depth
As previously promised , here's Anthropic's new fast, low cost model: Introducing Claude Haiku 5.5 . The previous Haiku, 4.5, was very much showing its age. It came out almost a year ago , and was priced at $1/million input and $5/million output - relatively expensive even back then, and a full 10x the price of OpenAI's GPT-6 Luna , released last month. The new Haiku exactly matches the price of G
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