Be clear and direct

This is the reference for prompt engineering with Claude's latest models, including Claude Fable 5, Claude Mythos 5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, Claude Sonnet 5, Claude Sonnet 4.6, and Claude Haiku 4.5. The page is organized in three parts:

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PublishedJun 9, 2026

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This is the reference for prompt engineering with Claude's latest models, including Claude Fable 5, Claude Mythos 5, Claude Opus 4.8, Claude Opus 4.7, Claude Opus 4.6, Claude Sonnet 5, Claude Sonnet 4.6, and Claude Haiku 4.5. The page is organized in three parts:

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