Unverified60% confidenceDecision RuleExact time
Anthropic recommends that when using Opus 5.5, users should no longer write emphatic phrases like "think carefully" or "think step-by-step," as they have become meaningless and may even interfere with the model.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
10/7/2026
First Seen
Valid until: 1/5/2027
Sources
Related Entities
Related Claims
UnverifiedAnthropic's Opus 5.5 held its position under the same follow-up questioning and did not easily change its answer.77% similarUnverifiedOpus 5 enables Extended Thinking by default; thinking can only be disabled at effort levels of high or below, and the official guidance strongly recommends not disabling thinking.76% similarUnverifiedStep 5 officially provides three levels of thinking modes — low, medium, and high — and is not a brute-force reasoning model.68% similarUnverified原文作为观点性短文，更多提出框架性思考，缺乏具体的量化证据和落地路径67% similarUnverifiedAnthropic's best-practice guidelines for Claude's system prompts recommend including in tool descriptions an explanation of when this tool should not be called.65% similar
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