Expired50% confidenceBenchmarkExact time
In 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.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/21/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/19/2026(expired)
Sources
Related Claims
UnverifiedAccording to benchmark data released by Anthropic, Sonnet 4.5 is slightly superior to Claude Opus 4.1 in coding capability.85% similarUnverifiedSonnet 5's Intelligence Index is 6 points higher than Sonnet 4.6's and surpasses Opus 4.8 on agentic knowledge work tasks.83% similarUnverifiedCompared to Opus 4.6, Sonnet 4.6 performs nearly on par on most benchmarks, but with faster inference speed and lower call costs.82% similarUnverifiedClaude Sonnet 4.6 scored higher than Opus 4.6 on the GDPVal AA benchmark.78% similar
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