Unverified50% confidenceDecision RuleExact time
Anthropic officially recommends setting the default effort value for Opus 5.5 to medium, as medium hit the sweet spot between performance and speed in official testing.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/7/2026
First Seen
Valid until: 1/5/2027
Sources
Related Entities
Related Claims
UnverifiedThe tester found that Opus 5.5's output was noticeably superior to the other three models in terms of fluidity, physical realism, and overall visual impression.77% similarUnverifiedeffort (reasoning intensity) is the primary control for adjusting the amount of reasoning in Opus 5.5; its default value is medium, and its performance at that level can match or even exceed Opus 5 at high intensity.74% similarUnverifiedIn terminal operation tests, Claude Opus 5.5 performs more strongly.74% similarUnverifiedThe default effort (thinking intensity) for Claude Opus 5 is high, whereas Opus 5.5 defaults to medium.73% similarUnverifiedAnthropic officially describes Opus 5.5 as the highest-performing model it has tested to date.71% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/984275API
curl https://kongchang.com/api/v1/knowledge/claims/984275MCP
get_claim(id=984275)