Anthropic Releases Fast, Cost-Efficient Haiku 4.5

Anthropi has unveiled Haiku 4.5, its latest lightweight AI model designed for fast, cost-efficient deployment. According to the company, Haiku 4.5 achieves performance on par with their earlier Sonnet 4 model but at one-third the cost and more than twice the speed.

In benchmark tests like SWE-Bench and Terminal-Bench, it competes strongly against larger models. Anthropic envisions Haiku 4.5 powering cost-sensitive, large-scale uses, especially in environments where heavier models plan complex tasks and Haiku 4.5 executes them.

This modular approach lets expensive models handle high-level strategy and lighter models manage routine operations. The release is immediately available across Anthropic’s free and paid plans.

Use cases such as code assistance, conversational agents, and multi-agent systems are likely to benefit first, thanks to reduced latency and lower compute overhead. With Haiku 4.5, Anthropic advances a model that strikes a balance between capability, speed, and affordability, thereby lowering the barrier to real-world AI adoption in everyday tools and services.