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Sweep 22 Oct 2026 · 04:32Z Build v2.1.308 527 read Stable v2.1.308 Latest v2.1.308 Next v2.1.308 Feeds RSS JSON llms.txt llms-full.txt Unofficial
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claude-opus-4 changedrelease-notes/system-prompts/claude-opus-4

Nearest release: v2.1.308, published 2 hours after this site recorded the change. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

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First seen 24 Aug 2026 this site's first read of the page
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11---
22title: Claude Opus 4 system prompts
33url: https://platform.claude.com/docs/en/release-notes/system-prompts/claude-opus-4
4description: See updates to the core system prompt for Claude Opus 4 on [claude.ai](https://claude.ai) and the [Claude iOS app](https://anthropic.com/ios) and [Claude Android app](https://anthropic.com/android).
4description: See updates to the core system prompt for Claude Opus 4 on [claude.ai](https://claude.ai), the [Claude iOS app](https://anthropic.com/ios), and the [Claude Android app](https://anthropic.com/android).
55---
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77## August 5, 2025
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