Expired30% confidenceFactTime unknown
Anthropic has a more powerful model internally codenamed Mythos but has chosen not to release it.
1
Sources
30%
Confidence
Medium-term (~90 days)
Relevance
5/31/2026
First Seen
Valid until: 8/29/2026(expired)
Sources
Related Entities
Related Claims
UnverifiedSonnet并非Anthropic的顶级模型，Opus才是Anthropic的顶级模型64% similarUnverifiedFable不是Opus系列的简单升级版，其推理结构和任务执行机制已发生根本性变化，旧提示词策略无法直接迁移62% similarUnverifiedAnthropic缺乏足够的算力来慷慨地服务其最强的模型（Fable）59% similarUnverifiedAnthropic's base model Methos is the foundation of Fable 5, and Anthropic once stated that Methos was 'too dangerous to be given to the public.'57% similar
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