Expired65% confidenceFactExact time
Claude Sonnet 5 switched to the Opus 4.7 tokenizer, which may result in approximately 1 to 1.3 times more tokens being produced from the same text.
3
Sources
65%
Confidence
Medium-term (~90 days)
Relevance
7/12/2026
First Seen
Valid until: 10/10/2026(expired)
Sources
Related Claims
UnverifiedOn some dimensions, Claude Sonnet 5.5 trails the more expensive Opus 5.5 by only 2 points.70% similarUnverifiedSonnet 5.5 and Opus 5.5 have the same cache read price, while Sonnet 5.5 is approximately half the price on all other items.69% similarUnverifiedSonnet 5在最大努力模式下的Token消耗量堪比OPUS，但效果更差69% similarVerifiedClaude Sonnet 5 scores 63.22% on SWE-bench Verified (Agentic Coding), approximately 6 percentage points behind Opus 4.8.68% similar
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