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depicts the layered architecture of model directives—how the Model Spec funnels behavior from Objectives through Rules to Defaults.

depicts the layered architecture of model directives—how the Model Spec funnels behavior from Objectives through Rules to Defaults.

Unlocking the Secrets of OpenAI's Model Specifications and Defaults

OpenAI’s Model Spec, first released in May 2024, sets out a three-tier framework for guiding how AI assistants like ChatGPT should behave.Published in May 2024, the Spec introduced a three-layer hierarchy: Objectives, Rules, and Defaults .

Jul 28, 20252 min read

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