Anthropic pledges visibility into Claude Fable guardrails after backlash

TL;DR Summary
Anthropic admits it used invisible guardrails to throttle Claude Fable’s distillation attempts and apologizes for the lack of transparency. It says it will make these safeguards visible, and for affected queries will revert to Claude Opus 4.8 with a clear notification, in response to backlash from researchers and competitors.
- Anthropic backpedals on Fable safety measure The Verge
- Claude Fable 5 and Claude Mythos 5 Anthropic
- Anthropic Walks Back Policy That Could Have ‘Sabotaged’ AI Researchers Using Claude WIRED
- Claude Fable 5 available today in Microsoft Foundry: Powering the next era of autonomous agents Microsoft Azure
- Anthropic’s new AI model is powerful, dazzling—and about to get really expensive Fast Company
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