AI Research1 min reading time

Quoting Claude Opus 5 system prompt

Simon Willison's WeblogPublished Aug 9, 2026

Anthropic's Claude Fable 5 and Mythos 5 models were briefly suspended in June 2026 due to U.S. export controls, but access was restored after the controls were lifted. Claude's system prompt now includes accurate, neutral information about this event.

#anthropic #claude-fable-5 #claude-mythos-5 #export-controls #large-language-models #u-s-department-of-commerce

Quoting Claude Opus 5 system prompt

More in AI Research

Different eval awareness may track different graders

Tracing Subliminal Learning Through Pretraining

What Is Data Poisoning? How Attackers Corrupt AI Models and Datasets