Claude Haiku 4.5 (AU)

Claude Haiku 4.5 is Anthropic's latest small model in the Claude Haiku family, positioned as a faster and more affordable sibling to the company's frontier releases. Anthropic's own announcement frames it as delivering coding performance comparable to Claude Sonnet 4, released roughly five months earlier, while costing one-third as much and running more than twice as quickly. A SWE-bench Verified chart published alongside the launch compares Claude Haiku 4.5 against other frontier models on real-world coding tasks, giving developers a concrete reference point for the trade-off between intelligence and efficiency that the Haiku tier is designed to balance.

The intended use cases for Claude Haiku 4.5 center on real-time, low-latency scenarios where speed matters as much as raw capability, including chat assistants, customer service agents, and pair programming in tools like Claude Code. Anthropic notes that Claude Haiku 4.5 even surpasses Claude Sonnet 4 on certain computer-use tasks, and that pairing it with larger Claude models lets a frontier system delegate high-volume subtasks to a quicker, cheaper runner. This combination of responsiveness and respectable coding skill makes Haiku 4.5 a practical choice for multi-agent workflows, rapid prototyping, and any deployment where cost-efficient intelligence has to keep up with live user interaction.