01 · The Lead — Read this first
Claude Fable 5 Launch
Simon Willison's Weblog
Anthropic has officially released Claude Fable 5, boasting a million-token context window and enhanced safety features. This model surpasses its predecessor, Claude Opus 4.8, in both knowledge and task execution, although it comes at a higher cost. The model is designed for complex coding tasks and comes with strict safeguards against sensitive topics.