Claude Haiku 4.5 (2025-10-01) (AWS Bedrock)

Claude Haiku 4.5 is Anthropic's small, efficiency-oriented model released on October 15, 2025, designed to bring near-frontier capabilities into real-time, high-volume settings. Anthropic positions it as delivering coding performance comparable to Claude Sonnet 4 on SWE-bench Verified while running at roughly one-third the cost and more than twice the speed, making it a natural fit for chat assistants, customer service agents, and pair programming workflows where responsiveness matters. The model also reportedly surpasses Sonnet 4 at certain computer-use tasks, broadening its utility for agentic applications and tools such as Claude for Chrome and Claude Code multi-agent setups.

Practically, Claude Haiku 4.5 is intended for scenarios where latency and cost dominate the requirements without sacrificing too much reasoning quality. Anthropic highlights its value both as a standalone choice for rapid prototyping and as a companion to Claude Sonnet 4.5, letting developers route simpler or speed-sensitive subtasks to Haiku while reserving Sonnet 4.5 for harder reasoning. The combination of strong coding scores on SWE-bench Verified, low-latency behavior, and economical deployment makes it well suited for production assistants and developer tools that need to stay responsive under sustained load.