Unverified50% confidenceFactExact time
Evaluation results show that while the trusted version of Claude 5.1 is stronger than the previous generation, it still has not entered the next tier of chemical and biological risk level.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/4/2026
First Seen
Valid until: 12/3/2026
Sources
Related Entities
Related Claims
UnverifiedThe input and output prices of Claude 5.1 remain consistent with the previous generation.64% similarUnverifiedClaude Fable 5.1 and Claude Mythos 5.1 are built on exactly the same underlying model with no difference in intelligence level; the only distinction lies in the safety protection level.61% similarUnverifiedThe latest and most powerful Claude models (Opus 4.8 and Sonnet 5) actually perform worse than older models when calling Pi's custom editing tool.60% similarUnverifiedAnthropic released Claude 5.1, along with a Claude Opus-level security version for trusted professional users.59% similarUnverifiedThe level of autonomous operation capability that Claude Sonnet 5 possesses was, just a few months ago, exclusive to larger and more expensive models58% similar
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