---
format: "aidr-story-markdown/v1"
id: "f932ce86887297f16c587a0230fd32498898380011abb85ac57fcfd51b944259"
canonical_url: "https://aidr.today/f932ce86?lang=en"
title: "Quoting Prompting Claude Fable 5.2"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-11-10T05:34:14.000Z"
category: "Tools"
topics: ["anthropic","llm","devtools"]
source_urls: ["https://simonwillison.net/2026/Nov/10/prompting-claude-fable-52/"]
summary: "Claude Fable 5.2 responds closely to prompts regarding code ownership in Anthropic's testing. When the prompt stated the code was its own, the model merged repeated code in about half of the tries. Without that sentence, the model merged repeated code in under a tenth of the tries."
---

# Quoting Prompting Claude Fable 5\.2

> [Open the canonical story](<https://aidr.today/f932ce86?lang=en>)

**Published:** 2026-11-10T05:34:14.000Z
**Category:** Tools
**Topics:** anthropic, llm, devtools

## Summary

Claude Fable 5\.2 responds closely to prompts regarding code ownership in Anthropic's testing\. When the prompt stated the code was its own, the model merged repeated code in about half of the tries\. Without that sentence, the model merged repeated code in under a tenth of the tries\.

## Sources

- [Story source](<https://simonwillison.net/2026/Nov/10/prompting-claude-fable-52/>)