← Back to feed

Claude's new system prompt really doesn't want to reproduce song lyrics

L2 · PractitionerModels & ReleasesSimon Willison's Blog· 9/2/2026

Reveals how platform guardrails are evolving due to legal pressure, affecting how practitioners can use Claude for creative or reference tasks.

AI Summary

Anthropic updated Claude's to explicitly forbid reproducing song lyrics and copyrighted visual works, likely in response to recent music industry lawsuits.

Excerpt

I wrote some notes on what's new in the (published) Fable 5.1 system prompt in comparison to Fable 5 - it's mostly about not reproducing song lyrics and avoiding drawing copyrighted characters simonwillison.net/2026/Sep/2/c...

Read Original
0 upvotes · 0 downvotes · 1 min read

Related Articles

L4 · DeveloperModels & ReleasesHacker News
Gemini 3.8 Flash

Google DeepMind released Gemini 3.8 Flash, expanding on Gemini 3.7 Flash with improved performance for software engineering and agentic workflows, featuring 1M token context and 64K output.

L4 · DeveloperModels & ReleasesHacker News
Quasar 438B: Europe's Leading AI Model

Multiverse Computing launches Quasar 438B, Europe's highest-scoring AI model with 43 on Artificial Analysis Intelligence Index and 15.3s response time.

L4 · DeveloperModels & ReleasesHacker News
Claude Fable 5.1 and Claude Mythos 5.1

Anthropic launches Claude Fable 5.1 and Mythos 5.1 with 25-45% cost reductions, improved safeguards, and enterprise data privacy controls.

L3 · BuilderModels & Releases@GoogleAI
Google AI (@GoogleAI): We’re introducing Gemini 3.8 Flash ⚡️ built to tackle complex agentic and multi-step tasks with even greater diligence. Our most intelligent workhorse model yet delivers significant improvements in

Google introduces Gemini 3.8 Flash with improved reasoning and agentic capabilities for complex multi-step tasks and coding projects.

L3 · BuilderModels & ReleasesTheSequence
The Sequence Learning Loop - Issue 925: Learn About Fable and Mythos 5.1, GLM-5.3-Flash, and Qwen 3.8

Anthropic released Claude Fable 5.1/Mythos 5.1, Zhipu launched GLM-5.3-Flash, and Alibaba unveiled the Qwen 3.8 family, each exploring how to build cost-effective, long-running autonomous models.