Anthropic J-Space Interpretability, Misuse & Claude Fable 5 + Opus 5

Anthropic’s J-Space proposal and Claude Fable 5.1, Opus 5.5, and Sonnet 5.5 remain central to debates over transparent reasoning, safety tooling, enterprise agents, and inference economics. Chain-of-thought faithfulness work and Anthropic’s usage-policy changes reinforce the need for independent evaluation and enforceable safeguards.