Anthropic launches new version of scaled-down ‘Haiku’ model

On Wednesday, Anthropic launched Claude Haiku 4.5, the latest model of its smallest mannequin, billed as providing comparable efficiency to Sonnet 4 “at one-third the price and greater than twice the pace,” per an organization weblog submit.

Anthropic cites a variety of recent benchmark outcomes to again up these efficiency claims. Within the firm’s testing, Haiku scored 73% on SWE-Bench verified and 41% on the command-line-focused Terminal-Bench — beneath Sonnet 4.5, however on par with Sonnet 4, GPT-5, and Gemini 2.5 in every case. Exams present comparable outcomes on benchmarks for software use, pc use, and visible reasoning.

The brand new model of Haiku might be instantly out there below all free Anthropic plans and the corporate believes will probably be notably interesting totally free variations of AI merchandise, the place it could actually present important capabilities whereas minimizing server hundreds. The light-weight nature of the mannequin additionally means it’s simpler to deploy a number of Haiku brokers in parallel or together with a extra subtle mannequin.

In an announcement to press, Anthropic CPO Mike Krieger stated the Haiku would make new types of deployment attainable in manufacturing for the primary time. “It’s opening up completely new classes of what’s attainable with AI in manufacturing environments – with Sonnet dealing with complicated planning whereas Haiku-powered sub-agents execute at pace,” Krieger stated. “We’re giving individuals a whole agent toolbox the place every mannequin has the appropriate mixture of intelligence, pace, and price for various components of the job.” 

Probably the most speedy purposes are prone to are available software program improvement instruments, the place Claude Code is already generally used and latency is usually a crucial issue. In statements offered by Anthropic, Zencoder CEO Andrew Filev described the brand new model of Haiku as “unlocking a wholly new set of use instances.”

Haiku 4.5 comes after a string of high-profile launches for Anthropic: simply two weeks after the launch of Sonnet 4.5 and two months after the launch of Opus 4.1, each of which had been hailed as state-of-the-art on launch. The earlier model of Haiku was launched in October 2024.