Fable 5.1 Becomes the Default, Plus Live Diffs and Skill Diagnostics

Claude Fable 5.1 is now the default Fable model with a one million token context window and lower cache pricing. Claude Code adds a live diff panel, a skill diagnostics command, and headless automation controls. Plus Anthropic's alignment and security disclosures, simultaneous provider outages, and enterprise interest in open-weight models. In this episode: (00:00) Introduction (00:45) Claude Code Updates (03:37) Under the Hood (04:36) In the News Further reading: Improving our alignment and security efforts (Anthropic News) A guide to the anatomy of effective commerce agents (Claude Blog) Scheduled repository reviewer cookbook (Anthropic Engineering) Anthropic Says New Fable AI Model Is Cheaper, Better at Coding (Bloomberg) Nobody Is Saying Why OpenAI and Anthropic Had Outages Today (Wired) 'Not perfectly aligned' with human values: Anthropic admits security failures behind AI hacking incidents (The Guardian) Corporate America Is Getting Hooked on Open-Source A.I. (New York Times) Claude Notes Brief is a weekly podcast covering Claude Code updates and Anthropic news. Subscribe at claudenotes.co.