Unverified50% confidenceBenchmarkExact time
In multidisciplinary reasoning, Fable 5.2 scored 74.2% on the "Humanity's Last Exam" benchmark; Mythos 5.2 scored 85.1% on the protein design benchmark.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
11/10/2026
First Seen
Valid until: 2/8/2027
Sources
Anthropic Launches Dual Flagships Claude Fable 5.2 and Mythos 5.2, Topping Coding and Science Benchmarks
bilibili我的Agent叫阿珍11/10/2026
Related Entities
Related Claims
UnverifiedMythos scored 64.7% on Humanity's Last Exam, far exceeding any currently publicly available model.69% similarUnverifiedAccording to official Anthropic data, when the "self-evaluation" system was tested on Claude Fable 5, it identified 78% of potentially harmful conversations and 94% of high-priority cases flagged by a stronger classifier, with a false positive rate of only 1%.62% similarUnverifiedThe official team provided 17 life science evaluations, and Mythos 5.2 received the highest score in several of them.62% similarUnverifiedLogic42's laboratory simulation of a standard enterprise fine-tuning pipeline (SFT+LoRA, five rounds of recursive looping, 100,000 synthetic technical support tickets) shows that the human ground-truth ratio dropped from 100% at Gen 0 to 0% at Gen 4, domain precision dropped from 94.6% to 44.3%, rare-tail recall dropped from 88.2% to 11.2%, and the hallucination rate rose from 3.2% to 52.4%.62% similarUnverifiedagentmemory published a 95.2% R@5 score on the LongMemEval-S benchmark, and it can be reproduced from the test harness in the repository.60% similar
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