Expired50% confidenceFactExact time
Anthropic uses a three-tier model naming system of Haiku, Sonnet, and Opus, and added a Mythos tier, which was subsequently renamed to a model called Fable.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/11/2026
First Seen
Valid until: 10/9/2026(expired)
Sources
GPT-5.6三模型解析：Sol/Terra/Luna定价与监管困局
bilibili63号炼金工坊7/1/2026
Related Claims
UnverifiedAnthropic adopts a model family strategy, offering the lightweight Haiku, the balanced Sonnet, and the most capable Opus series.68% similarVerifiedAnthropic's model product line adopts a three-tier architecture: Haiku (lightweight and fast), Sonnet (balanced cost-performance), and Opus (flagship performance).66% similarUnverifiedAnthropic采用Haiku/Sonnet/Opus的能力分层体系65% similarUnverifiedAnthropic has proposed a hybrid invocation strategy in which Sonnet 4.5 handles complex reasoning and task decomposition, which is then handed off to multiple Haiku 4.5 instances executing subtasks in parallel.63% similarUnverifiedA multi-agent workflow pattern is forming in the Anthropic community in which Sonnet 4.5 handles architectural planning and Haiku 4.5 handles code implementation.59% similar
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