Claude Fable 5 and new AI safety fables

Claude Fable 5 and new AI safety fables

From Interconnects by Nathan Lambert

June 9, 2026 · 12 min

About this episode

The episode discusses the release of Anthropic's Claude Fable 5 model and the implications of its safety measures.

Edit Jun. 11: Anthropic changed their silent model manipulation of AI research queries to also use a classifier like the other safety domains. This addresses a key concern I had in the mistreatment of “safety” in the release, and props to Anthropic for a quick change, but it does not fully address the trust that has been broken. I shared more reflections here . Today, Anthropic released their Claude Fable 5 model to consumer and enterprise audiences. This is the general-access variant of their Mythos-class models. With it, Anthropic rolled out a series of safety measures — some explicitly called out to users and some modifying the model without telling the user. It should be less surprising than it is that the next major step in AI capabilities came with heavier-handed safety measures indicating Anthropic’s intention to protect, or entrench, their current lead. The unevenly applied safety policies that Anthropic have rolled out are on track to become a classic cautionary fable in how narrow and self-fulfilling notions of safety and control rarely work out. The smartest model in the world Before digging into the nuance of the safety facts, it is important to establish the quality…

People in this episode

Host: Nathan Lambert

Topics covered

  • AI safety
  • Claude Fable 5
  • Anthropic
  • model capabilities
  • technology ethics

Keywords

  • AI
  • safety measures
  • Claude Fable 5
  • Anthropic
  • model capabilities
  • technology

Mentioned in this episode

Organizations: Anthropic

Products: Claude Fable 5

Books & works: Mythos-class models

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