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Anthropic tells users to drop "think hard" prompts for Claude Opus 5.5

Anthropic's Nov. 12 guide says Opus 5.5 always thinks, so cues like "think hard" can go. Medium is the default effort, and Anthropic says Opus 5.5 at Medium matched or beat Opus 5 at High on its coding and knowledge-work evals. It says Sonnet 5.5 at Extra high or Max costs about as much per task as Opus 5.5.

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Primary source

Anthropicclaude.com/resources/articles/using-claude-opus-5-5-as-your-daily-driver-for-knowledge-work

Coverage · 2 articles, oldest first

Saturday, November 14, 2026

  1. The Decoder

    Anthropic says outdated prompting habits are slowing down Claude Opus 5.5

  2. AnthropicPrimary

    Anthropic tells users to drop "think hard" prompts for Claude Opus 5.5
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