On Wednesday, Anthropic released Claude Haiku 4.5, the newest version of its smallest model, billed as offering similar performance to Sonnet 4 “at one-third the cost and more than twice the speed,” per a company blog post. While the

Anthropic sites a range of new benchmark results to back up those performance claims. In the company’s testing, Haiku scored 73% on SWE-Bench verified and 41% on the command-line-focused Terminal-Bench — below Sonnet 4.5, but on par with Sonnet 4, GPT-5 and Gemini 2.5 in each case. Tests show similar results on benchmarks for tool use, computer use, and visual reasoning.

The new version of Haiku will be immediately available under all free Anthropic plans and the company believes it will be particularly appealing for free versions of AI products, where it ca

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