Expired90% confidenceFactTime unknown
At the maximum effort setting, Opus 4.5 surpasses Sonnet 4.5 by 4.3 percentage points while still reducing tokens by 48%.
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
UnverifiedSonnet 5 is only approximately 72% cheaper than Opus 4.8 Max.78% similarUnverifiedOn the SWE-Bench Pro benchmark, Sonnet 5 significantly trails Opus 4.8.74% similarUnverifiedTesters recommended continuing to use Opus 4.8 for the vast majority of tasks for better results, and considered Sonnet 5 disappointing.74% similarUnverifiedAnthropic 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%.73% similarUnverifiedCompared to Opus 4.6, Sonnet 4.6 performs nearly on par on most benchmarks, but with faster inference speed and lower call costs.72% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/13803API
curl https://kongchang.com/api/v1/knowledge/claims/13803MCP
get_claim(id=13803)