Claude Code 的提示詞減少 80%——為何 Fable 5 模型更少即是更多
anthropic 將 claude code 的系統提示詞減少了 80%，因為發現 fable 5 模型在指令較少時表現更好。這改變了開發者優化 ai 模型效能的方式。
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.