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Checked fact 35593 Nov 2026Agents and apps

Anthropic's prompting guide says Claude Opus 4.5 and Claude Opus 4.6 are more responsive to the system prompt than previous models.

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Claude Opus 4.5 and Claude Opus 4.6 are also more responsive to the system prompt than previous models.

What the source said when we opened it, on 3 Nov 2026.

The source

Prompting best practices - Claude Platform Docs
Anthropic

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What a system prompt does, and which of Anthropic's prompts are published 3 Nov 2026

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