Verified65% confidenceFactExact time
In Anthropic's model naming system, Opus represents the most powerful version, Sonnet is the mid-tier version, and Haiku is the lightweight version.
3
Sources
65%
Confidence
Long-term
Relevance
5/12/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedWithin Anthropic's product line, the Opus series focuses on the strongest reasoning capability, the Haiku series focuses on being lightweight and fast, and the Sonnet series strikes a balance between the two.75% similarUnverifiedHaiku is the lightweight, high-speed, low-cost model in the Anthropic Claude series, corresponding to the more powerful but more expensive Sonnet and Opus.70% similar
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