- In short
- The Claude model family is Opus, Sonnet, and Haiku positioned along a single capability-cost-latency spectrum rather than as interchangeable versions of one model. Opus targets the hardest reasoning, coding, and research-synthesis work; Haiku targets high-volume, low-latency, cost-sensitive work; Sonnet is the balanced mid-tier and the conventional default starting point. Reading the family as a spectrum is what lets an architect match a tier to what a step actually requires.
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