claude-prompting-best-practices changedbuild-with-claude/prompt-engineering/claude-prompting-best-practices
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1111* **Migration considerations** last, for prompts moving from earlier generations.
1212
1313<Tip>
14 For an overview of model capabilities, see the [models overview](https://platform.claude.com/docs/en/models/overview). For Claude Fable 5.1 capabilities and API changes, see [What's new in Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/whats-new-fable-5-1). For Claude Fable 5 capabilities and API changes, see [Introducing Claude Fable 5 and Claude Mythos 5](https://platform.claude.com/docs/en/models/fable-5/introducing-claude-fable-5-and-claude-mythos-5). For details on what's new in Claude Sonnet 5, see [What's new in Claude Sonnet 5](https://platform.claude.com/docs/en/models/sonnet-5/whats-new-sonnet-5). For details on what's new in Claude Opus 5, see [What's new in Claude Opus 5](https://platform.claude.com/docs/en/models/opus-5/whats-new-opus-5). For migration guidance, see the [Migration guide](https://platform.claude.com/docs/en/about-claude/models/migration-guide). For Claude Opus 5.5, see [What's new in Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/whats-new-opus-5-5).
14 For an overview of model capabilities, see the [models overview](https://platform.claude.com/docs/en/models/overview). For Claude Fable 5.1 capabilities and API changes, see [What's new in Claude Fable 5.1](https://platform.claude.com/docs/en/models/fable-5-1/whats-new-fable-5-1). For Claude Fable 5 capabilities and API changes, see [Introducing Claude Fable 5 and Claude Mythos 5](https://platform.claude.com/docs/en/models/fable-5/introducing-claude-fable-5-and-claude-mythos-5). For details on what's new in Claude Sonnet 5, see [What's new in Claude Sonnet 5](https://platform.claude.com/docs/en/models/sonnet-5/whats-new-sonnet-5). For migration guidance, see the [Migration guide](https://platform.claude.com/docs/en/about-claude/models/migration-guide). For Claude Opus 5.5, see [What's new in Claude Opus 5.5](https://platform.claude.com/docs/en/models/opus-5-5/whats-new-opus-5-5).
1515</Tip>
1616
1717## Model-specific guidance
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777777* **Prefer general instructions over prescriptive steps.** A prompt like "think thoroughly" often produces better reasoning than a hand-written step-by-step plan. Claude's reasoning frequently exceeds what a human would prescribe.
778778* **Multishot examples work with thinking.** Use `<thinking>` tags inside your few-shot examples to show Claude the reasoning pattern. It will generalize that style to its own extended thinking blocks.
779779* **Manual chain-of-thought (CoT) prompting as a fallback.** When thinking is off, you can still encourage step-by-step reasoning by asking Claude to think through the problem. Use structured tags like `<thinking>` and `<answer>` to cleanly separate reasoning from the final output. On Claude Opus 5, prefer keeping thinking enabled at a lower effort level instead: with thinking disabled, the model can occasionally emit internal XML tags into its visible output, so see [Running with thinking disabled](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-opus-5#running-with-thinking-disabled) before applying this pattern there.
780* **Ask Claude to self-check.** Append something like "Before you finish, verify your answer against \[test criteria]." This catches errors reliably, especially for coding and math. Claude Opus 5 is the exception: it verifies its own work well without explicit instruction, and verification instructions carried over from prompts tuned for earlier models can cause over-verification, adding tokens and latency. When migrating to Claude Opus 5, remove these instructions rather than rewriting them. See [Task scope and over-verification](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-opus-5#task-scope-and-over-verification).
780* **Ask Claude to self-check.** Append something like "Before you finish, verify your answer against \[test criteria]." This catches errors reliably, especially for coding and math. Claude Opus 5 is the exception: it verifies its own work well without explicit instruction, and verification instructions carried over from prompts tuned for earlier models can cause over-verification, adding tokens and latency. On Claude Opus 5, remove these instructions rather than rewriting them. See [Task scope and over-verification](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-opus-5#task-scope-and-over-verification).
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782782<Note>
783783 When extended thinking is disabled, Claude Opus 4.5 is particularly sensitive to the word "think" and its variants. Consider using alternatives like "consider," "evaluate," or "reason through" in those cases.
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