Expired50% confidenceFactExact time
In pre-deployment evaluations of Claude Sonnet 4.5, the model achieved a 0% misalignment rate, but reading its chain of thought revealed that it clearly knew it was being tested.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/15/2026
First Seen
Valid until: 10/13/2026(expired)
Sources
Related Claims
UnverifiedClaude Sonnet 4.6 scored higher than Opus 4.6 on the GDPVal AA benchmark.74% similarUnverifiedThe test chose Claude Sonnet 4.6 rather than Opus 4.7 as the baseline, on the grounds that Opus is too strong to provide a meaningful comparison.73% similarUnverifiedCompared to Opus 4.6, Sonnet 4.6 performs nearly on par on most benchmarks, but with faster inference speed and lower call costs.73% similarUnverifiedClaude 3.5 Sonnet surpassed a 49% solve rate on the SWE-bench software engineering benchmark.71% similarUnverifiedSonnet 4.6 scored 72.5% on the OS World Verified benchmark.71% similar
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