Unverified50% confidenceFactExact time
Opus is the name of the flagship model in Anthropic's Claude series, which also includes two tiers: Sonnet (mid-weight) and Haiku (lightweight).
1
Sources
50%
Confidence
Long-term
Relevance
10/16/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedThe Opus series is Anthropic's highest-specification model line, with a unit price far higher than lightweight versions such as Sonnet or Haiku.79% similarUnverifiedThe Claude model family is generally divided into three tiers: Haiku, Sonnet, and Opus.79% similarUnverifiedOpus is the highest-positioned and most capable tier in Anthropic's Claude model family, relative to Sonnet and Haiku.77% similarUnverifiedAnthropic's Claude series adopts a tiered naming structure of Fable > Opus > Sonnet > Haiku.76% similar
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