Claude Haiku 5.5 Overview

Claude Haiku 5.5 is the fastest and lowest-cost model in Anthropic’s Claude 5.5 family, built for high-volume and latency-sensitive work such as classification, extraction, routing, and customer support. It reads text and images, calls tools, and offers configurable effort, so a request can trade response time against depth. Its 1M-token context window and 128K-token maximum output also make it a practical sub-agent inside larger coding and research workflows.