Claude Haiku 5.5

Claude Haiku 5.5 is the smallest and cheapest model in Anthropic's 5.5 line, released 2026-10-07. OpenRouter lists $0.1 per million input tokens and $0.5 output, with a 1,000,000-token context and text, image and PDF input. That price is a tenth of Haiku 4.5's $1 and $5, and the context is five times larger than the 200,000 tokens of that earlier model. It is closed and proprietary. We would suggest it for high-volume, low-risk work such as tagging, routing, extraction and first-pass summaries, where cost per call matters most. The limit is the one that comes with any small model: on multi-step coding or ambiguous instructions, a step up to Sonnet 5.5 is the usual move, and we have no hands-on result to quote. Prices and specifications come from the OpenRouter listing we checked on 31 October 2026, and we have not tested the model ourselves.