Anthropic has released an official prompt guide for its Opus 5 model, advising users to remove redundant content from prompts rather than adding more instructions. The guide aims to help users improve AI output quality and relevance through concise prompting, reflecting the latest thinking in prompt engineering.
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Anthropic's official Opus 5 prompt guide bucks convention with a core principle: "Delete things, don't add things," emphasizing that streamlining prompts improves model performance.
Anthropic's official Opus 5 prompt guide introduces a counterintuitive core principle: "teaches you to delete things, not add things." This is the opposite of what many users are accustomed to—adding more instructions to constrain the model.
The guide suggests that overly complex prompts may actually interfere with the model's understanding, while streamlined, focused prompts can more effectively guide Opus 5 to generate desired outputs.
The guide was officially released by Anthropic and shared via the social media account "Xiao Hu" on X (formerly Twitter). The release date was July 27, 2026.
Currently, the specific content of the guide has not been made public; only its core thesis is known from the title and summary. Anthropic has not yet provided further details or examples.
This report is based on second-hand sharing on social media. The original guide comes from Anthropic, but the specific content has not been independently verified.
The core of the Anthropic Opus 5 prompt guide is "delete things, not add things," suggesting that when using AI models, concise prompts may be more effective than lengthy instructions.
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