生成式人工智能的发展冲击了以自然人为核心的传统著作权认定体系，自然人通过提示词的修改和结果的筛选所形成的作品，往往因为其算法黑箱特征难以判断自然人对于作品的实际贡献程度。司法实践认定自然人经提示词筛选控制所成内容具可版权性，但未就提示词介入深度进行解释。本文聚焦于实质性贡献的规范内涵，矫正额头流汗原则和实际控制理论上的偏差，注重人类智力投入对作品独创性表达产生的重要作用，主张确立过程导向的审查方式，通过对创作节点的细化分解、结合创作的因果链条和贡献程度的质量比对，跳出黑箱技术以甄别人类的创造性要素和条件，在激励技术创新与坚守著作权法人类中心主义价值之间寻求平衡。

The rise of generative AI challenges the traditional copyright system centered on natural persons. Works created by natural persons through prompt adjustments and output selections often face difficulties in assessing human contribution due to algorithmic black boxes. Judicial practice recognizes the copyrightability of such AI-assisted outputs but fails to clarify the depth of human involvement via prompts. This paper focuses on the normative meaning of “substantial contribution,” correcting deviations in the sweat-of-the-brow doctrine and actual control theory. It emphasizes the role of human intellectual input in shaping original expression and advocates a process-oriented review approach. By analyzing creative nodes, causal chains, and contribution levels, it identifies human creativity beyond technical black boxes, balancing technological innovation with the anthropocentric values of copyright law.