Expired90% confidenceFactTime unknown
Anthropic introduced an effort parameter in the API, where medium effort can match Sonnet 4.5's best SWE-Bench score while reducing output tokens by 76%.
1
Sources
90%
Confidence
Medium-term (~90 days)
Relevance
5/31/2026
First Seen
Valid until: 8/29/2026(expired)
Sources
Related Entities
Related Claims
UnverifiedAnthropic stated that Sonnet 4.6 performs on par with Opus 4.6 in terms of resistance to prompt injection.74% similarUnverifiedAt the maximum effort setting, Opus 4.5 surpasses Sonnet 4.5 by 4.3 percentage points while still reducing tokens by 48%.73% similarUnverifiedSonnet 5's Max Effort mode produces approximately 40% more output tokens per Intelligence Index task compared to Sonnet 4.6.73% similarUnverifiedTesters recommended continuing to use Opus 4.8 for the vast majority of tasks for better results, and considered Sonnet 5 disappointing.72% similarUnverifiedOn the SWE Bench Pro programming benchmark, Sonnet 5 achieved 63.2% and Opus 4.8 achieved 69.2%.70% similar
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