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Checked fact 35533 Nov 2026Agents and apps

Anthropic's system prompts page says Claude's web interface (claude.ai) and mobile apps use a system prompt to provide up-to-date information, such as the current date, to Claude at the start of every conversation.

The exact words it rests on

Claude's web interface (claude.ai) and mobile apps use a system prompt to provide up-to-date information, such as the current date, to Claude at the start of every conversation.

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

The source

System prompts - Claude Platform Docs
Anthropic

Checked

Checked by the notis newsroom on , against the source above.

In the story

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

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