Claude Codeのプロンプトが80%短縮 — Fable 5にとって「少ないほど良い」理由
Anthropicは、Fable 5モデルがより少ない指示と例を好むことが判明したため、Claude Codeのシステムプロンプトを80%削減した。これにより、開発者がより高いパフォーマンスのためにAIモデルを最適化する方法が変化する。
anthropic has reduced claude code's system prompt by 80%, discovering that its fable 5 models perform better with less rigid instruction. engineer tariq shihipar notes that adding examples now tends to constrain the model's imagination rather than guide it, marking a reversal from previous engineering trends. the company now prioritizes context-based steering over explicit 'do not do this' constraints. this suggests that as models scale, their interaction patterns must fundamentally change to maximize utility.