Unverified50% confidenceBenchmarkExact time
Under the highest difficulty settings of Terminal Bench 4.0, Sonnet 5.5 outperforms Opus 5.5.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/30/2026
First Seen
Valid until: 12/29/2026
Sources
Related Entities
Related Claims
UnverifiedOn the SWE-Bench Pro benchmark, Sonnet 5 significantly trails Opus 4.8.79% similarUnverifiedOn Cursor Bench, Sonnet 5.5's best score is only about two points behind Opus 5.577% similarUnverifiedIn the agentic computer use benchmark, Opus 4.8 on the high setting and Sonnet 5 on the max setting perform comparably, but Sonnet 5 consumes more tokens76% similarUnverifiedIn 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.75% similarUnverifiedSonnet 5's token consumption in maximum-effort mode is comparable to OPUS, but with worse results74% similar
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