Introducing Claude Haiku 5.5
Anthropic announces Claude Haiku 5.5, its fastest and most capable small model, built for high-volume work. It is available on AWS, Google Cloud, Microsoft Azure and the Claude Platform as claude-haiku-5-5.
What the article says
Anthropic announces Claude Haiku 5.5 on October 7, 2026 (model ID claude-haiku-5-5), which it calls its cheapest, fastest and most capable small model to date. It targets repetitive high-volume work such as summaries, compactions, database queries and classification, can serve as a subagent alongside Opus 5.5 and Sonnet 5.5, and suits speed-sensitive uses. It is the first Haiku-class model with an adjustable effort setting. It is available on all platforms, including AWS, Google Cloud and Microsoft Azure.
On pricing, Anthropic says it costs about 75% less than Haiku 4.5 on average, at $0.10 input and $0.50 output per million tokens for prompts up to 100k tokens. Sonnet 5.5 cache reads are cut by half, and a monthly API credit is rolling out for Max, Ultra and Team subscribers. Results improve clearly over Haiku 4.5 on every listed benchmark while mostly trailing Sonnet 5.5, which remains the better choice for complex agentic coding. Anthropic also describes stronger safeguards in cybersecurity and biology.
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