Unverified50% confidenceFactExact time
The two-stage classifier runs on top of Claude Sonnet 5.5, Opus 5 and 5.5, and Fable 5 and 5.1, and Anthropic says its false positive rate is below 0.1%.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/13/2026
First Seen
Valid until: 1/11/2027
Sources
Related Entities
Related Claims
UnverifiedClaude Fable 5.1 launched with a cache price of 2.5%, Claude Opus 5.5 and GPT-6.1 Sol both at 5%, and by October 7 Anthropic also halved the Sonnet 5.5 cache price to 5%.76% similarUnverifiedIn agentic search tests, Sonnet 5 outperformed Sonnet 4.6 across all effort levels, but its overall performance was below Opus 4.8, placing it at approximately the Opus 4.7 level overall.74% similarUnverifiedClaude Sonnet 5.5 achieves 61.6% on the Chartography benchmark without requiring external OCR tools.72% similar
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