Anthropic Updates Claude's System Prompt: Strict Ban on Reproducing Song Lyrics and Copyrighted Characters
Overview
FAQ
What is the new Claude system prompt update?
Anthropic released updated system prompts for Claude models (Fable 5.1) with new strict rules against reproducing copyrighted content like song lyrics and cartoon characters.
How does this affect developers in the Middle East?
Developers in the region using Claude for creative content or commercial applications must ensure they do not violate copyright, which may limit some use cases.
Can Claude now copy old song lyrics?
Yes, works published before 1929 are allowed, such as Shakespeare's sonnets, but Claude verifies the date and may refuse if unsure.
What are the changes in Claude's response style?
Claude is now more direct and less cautious, avoids words like 'genuinely' or 'honestly', and does not over-apologize when dealing with rude users.
Source: Simon Willison (LLM & tools)
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