Unverified60% confidenceEventExact time
Anthropic's status page recorded an incident involving Claude Mythos 5.1 and Claude Fable 5.1, in which both models experienced intermittent increases in error rates during a similar time period.
2
Sources
60%
Confidence
Short-term (~14 days)
Relevance
10/12/2026
First Seen
Valid until: 10/26/2026
Sources
Related Entities
Related Claims
UnverifiedAnthropic's next-generation frontier model Claude Fable 5.2 is reportedly ready and is regarded as a significant upgrade over Fable 5.1.68% similarUnverifiedClaude Fable 5.1 belongs to the Mythos tier of the Claude 5 family and shares the same underlying architecture as Claude Mythos 5.1.68% similarUnverifiedAnthropic released two models on September 2nd, Fable 5.1 and Mythos 5.1, which share the same set of base model weights but differ in safety policies and access scope.66% similar
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