Anthropic's fastest, cheapest Claude — near-instant responses with surprising reasoning for the price.
Claude Haiku is Anthropic's lightweight model: it returns answers in a blink and costs pennies, while still handling classification, extraction, and light reasoning better than models twice its size. Haiku 3.5 / 4-class variants are the workhorse for high-volume, latency-sensitive jobs.
Who it's for: Builders who need a cheap, instant model for classification, routing, summarization, and high-volume chat — where cost and speed beat max intelligence.
Lowest latency in the Claude family.
Fraction of the cost of Opus/Sonnet.
Excellent at structured output at scale.
Anthropic's guardrails included.
Use Claude Haiku as your default for fast, cheap, high-volume tasks — routing, tagging, summaries. Step up to Sonnet or Opus when the task needs real depth.