Expired60% confidenceOpinionExact time
Testers recommended continuing to use Opus 4.8 for the vast majority of tasks for better results, and considered Sonnet 5 disappointing.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/6/2026
First Seen
Valid until: 10/4/2026(expired)
Sources
Claude Sonnet 5 Hands-On Review: The Hidden Token Trap That Makes 'Low Cost' an Illusion
bilibili浮生千山路w6/30/2026
Related Claims
Unverified测评者建议几乎所有任务都应坚持使用OPUS 4.8而非Sonnet 5，因OPUS 4.8性能大幅领先82% similarUnverifiedOn the SWE-Bench Pro benchmark, Sonnet 5 significantly trails Opus 4.8.80% similarVerifiedThe company states that Sonnet 5 shows significant improvements over Sonnet 4.6 in reasoning, tool use, coding, and knowledge work, with overall performance approaching OPUS 4.8 but at a lower price.79% similarUnverifiedThe engineering lead at Base44 stated that Sonnet 5.5 is the model with the lowest tool-call failure rate.76% 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 tokens75% similar
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