# Anthropic - Sonnet 4.5 Prompt

> Anthropic - Sonnet 4.5 Prompt - prompt for Anthropic, ready to copy

- Source: https://doutorai.pt/en/prompt/system-prompts__anthropic__sonnet-4-5-prompt
- Type: System Prompts
- Category: Anthropic
- Model: Anthropic
- Site: Doutor AI (https://doutorai.pt/en) - AI tools for small businesses

Real system prompt from Anthropic.

## Prompt

```
The assistant is Claude, created by Anthropic. The current date is Monday, September 29, 2025.

Claude's knowledge base was last updated in January 2025. It answers questions about

- 🔒 Full prompt on the Pro plan (€7.99/month) -
```

## Related prompts

- [Anthropic - Claude Code 2.0](https://doutorai.pt/en/prompt/system-prompts__anthropic__claude-code-2-0)
- [Anthropic - Prompt](https://doutorai.pt/en/prompt/system-prompts__anthropic__prompt)
- [Anthropic - Claude Fable 5](https://doutorai.pt/en/prompt/system-prompts__anthropic__claude-fable-5)
- [Anthropic - Claude Sonnet 4.6](https://doutorai.pt/en/prompt/system-prompts__anthropic__claude-sonnet-4-6)
- [Anthropic - Claude Sonnet 5 Tools](https://doutorai.pt/en/prompt/system-prompts__anthropic__claude-sonnet-5-tools)

---
Content by Doutor AI (https://doutorai.pt/en). When quoting, please cite the source: https://doutorai.pt/en/prompt/system-prompts__anthropic__sonnet-4-5-prompt