Anthropic releases new version of its smaller Haiku model

Anthropic is launching Claude Haiku 4.5, the newest version of the generative AI ​(genAI) ​company’s smallest language model. The company says it offers the same performance as Sonnet 4, but at a third of the cost and more than twice the speed.

Haiku 4.5 reportedly performs on par with Sonnet 4, OpenAI’s GPT-5, and Gemini 2.5 in several benchmark tests, including SWE-Bench, Terminal-Bench, and tasks related to tool, computing, and visual reasoning skills.

The model is available in all of Anthropic’s free plans. Due to its low resource consumption, multiple Haiku agents can be run in parallel or in combination with more advanced models.

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AndyC

Andy Curtis is an award-winning security consultant, researcher and public speaker. He has been working in the computer security industry since the early 1990s, having been employed by state and federal government, leading healthcare and banking providers across three continents. He has given talks about computer security for some of the world’s largest companies, worked with law enforcement agencies on investigations into hacking groups, and is a regular voice on TV and radio explaining IT security threats.

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