Claude Haiku 4.5

Claude Haiku 4.5 is Anthropic's lightweight model in the Claude family, positioned as the fast and efficient option below the more capable Sonnet and Opus tiers. As part of Anthropic's fourth-generation Claude models, Haiku 4.5 represents the speed-optimized variant designed for high-volume applications where rapid response times are prioritized. The model supports both text and image inputs through its 200,000 token context window, enabling multimodal conversations and document analysis. Claude Haiku 4.5 includes tool calling capabilities, allowing it to interact with external APIs and execute functions. With a knowledge cutoff of February 2025, it has relatively current training data. Despite being the lightweight tier, it maintains vision processing abilities that were not available in earlier Haiku generations. Haiku 4.5 serves applications requiring fast inference speeds at scale, such as content moderation, customer support automation, and real-time chat applications. While it sacrifices some reasoning depth compared to Sonnet and Opus variants, it delivers significantly faster response times, making it suitable for latency-sensitive deployments where good-enough performance is preferred over maximum capability.