Expired90% confidenceFactTime unknown
Compared to the previous generation Sonnet 3.7, Claude 4 Sonnet delivers better intelligence at the same cost and has been optimized for issues of 'excessive eagerness' and reward hacking
1
Sources
90%
Confidence
Medium-term (~90 days)
Relevance
6/1/2026
First Seen
Valid until: 8/30/2026(expired)
Sources
Related Entities
Related Claims
Partially VerifiedThe 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.82% similarUnverifiedThe tester believes that Claude 3.5 Sonnet may have been Anthropic's "one lucky strike," and that subsequent Sonnet 3.7, Sonnet 4, and Sonnet 4.5 have not achieved genuine breakthroughs.76% similarUnverifiedSonnet 5's Intelligence Index is 6 points higher than Sonnet 4.6's and surpasses Opus 4.8 on agentic knowledge work tasks.75% similarUnverifiedClaude 3.5 Sonnet demonstrates outstanding performance in tool-calling accuracy and the reliability of parameter generation.75% similarUnverifiedAccording to benchmark data released by Anthropic, Sonnet 4.5 is slightly superior to Claude Opus 4.1 in coding capability.74% similar
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