Claude Haiku 4.5 is designed as a lightweight powerhouse that brings frontier-level capability to real-time and high-volume applications. It introduces extended thinking to the Haiku family, enabling controllable reasoning depth with summarized or interleaved thought output. The model matches Claude Sonnet 4's performance on coding, computer use, and agent tasks, delivering near-frontier intelligence at a fraction of the cost and latency of larger Claude models. Its architecture supports full tool-assisted workflows including coding, bash, web search, and computer-use tools, making it suitable for complex multi-step tasks where responsiveness matters.

The model achieves a 73.3% score on SWE-bench Verified, ranking it among the world's best coding models while maintaining exceptional responsiveness for sub-agents, parallelized execution, and scaled deployment. Built to serve developers across multiple platforms including Claude Code, Cursor, Amazon Bedrock, Google Vertex AI, and Microsoft Foundry, Haiku 4.5 is engineered for high-volume, cost-sensitive production environments. Its extended thinking capabilities allow developers to dial reasoning depth up or down depending on task complexity, while prompt caching and batch processing features support efficient resource utilization at scale.