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thinking-steering-and-cost changedbuild-with-claude/thinking-steering-and-cost

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First seen 14 Aug 2026 this site's first read of the page
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38382. Add prompt guidance only if Claude’s triggering still doesn’t match your needs at that level.
3939 
4040<Note>
41 To get less thinking on Claude Sonnet 5.5 and Claude Haiku 5.5, lower the effort level. Asking Claude Sonnet 5.5 in the system prompt to think less doesn’t reliably reduce its thinking, and in Anthropic’s testing, telling Claude Haiku 5.5 in the prompt to answer directly didn’t stop it from thinking. See [Prompting Claude Sonnet 5.5](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-sonnet-5-5#calibrate-effort) and [Prompting Claude Haiku 5.5](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-haiku-5-5#use-effort-to-control-thinking).
41 To get less thinking on Claude Sonnet 5.5 and Claude Haiku 5.5, lower the effort level. Asking Claude Sonnet 5.5 in the system prompt to think less doesn’t reliably reduce its thinking. In Anthropic’s testing, telling Claude Haiku 5.5 in the prompt to answer directly didn’t stop it from thinking. See [Prompting Claude Sonnet 5.5](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-sonnet-5-5#calibrate-effort) and [Prompting Claude Haiku 5.5](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/prompting-claude-haiku-5-5#use-effort-to-control-thinking).
4242</Note>
4343 
4444For broader prompting guidance with thinking, see [leverage thinking and interleaved thinking capabilities](https://platform.claude.com/docs/en/build-with-claude/prompt-engineering/claude-prompting-best-practices#leverage-thinking-and-interleaved-thinking-capabilities).
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