Introducing Claude Haiku 4.5
Claude Haiku 4.5, our latest small model, is available today to all users.

Seems this version is to focus on front user end tasks, like chat bots where speed is required rather than it's use for coding and so on.
Users who rely on AI for real-time, low-latency tasks like chat assistants, customer service agents, or pair programming will appreciate Haiku 4.5’s combination of high intelligence and remarkable speed. And users of Claude Code will find that Haiku 4.5 makes the coding experience—from multiple-agent projects to rapid prototyping—markedly more responsive.