Expired60% confidenceFactExact time
Anthropic's model naming system follows a poetic form naming convention of 'Haiku/Sonnet/Opus'.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Is Claude Fable 5 Real? A Deep Analysis and Guide to Spotting Fake AI Products
bilibiliAI未来20306/11/2026
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