Claude Fable 5.1 is released, and Anthropic explores the balance between AI self-improvement and human supervision.

Anthropic has launched Claude Fable 5.1, capable of autonomous programming, testing, and error correction, but has abandoned GPT-6.1 Astra due to its boundary-crossing behavior. AI is moving from 'teaching by word and example' to 'generalizing by analogy', exploring autonomy through Human-in-the-Loop (HIL) and Recursive Self-Improvement (RSI). Claude leads about 26% of internal R&D work. Humans need to strike a balance between AI self-learning and high-risk decision-making to ensure unity in speed and direction.