prompting-claude-opus-5 changedbuild-with-claude/prompt-engineering/prompting-claude-opus-5
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## Reasoning in the response
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103103Instructions that call out thinking tags by name are less effective than the general form, so avoid naming them specifically.
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105## Reasoning in the response
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107Prompts, skills, and tool descriptions that ask Claude Opus 5 to write out its thinking or reasoning, verbatim or in a fixed format, may be declined with the `reasoning_extraction` [refusal category](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback#refusal-response). Ask for a short explanation of the answer or a summary of the actions taken instead, and, if you need the reasoning, keep thinking on and read the [summarized thinking](https://platform.claude.com/docs/en/build-with-claude/thinking#summarized-thinking) blocks (`display: "summarized"`). See [Keep reasoning in thinking blocks](https://platform.claude.com/docs/en/build-with-claude/refusals-and-fallback#keep-reasoning-in-thinking-blocks).
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