The Model Spec specifies desired behavior for the models underlying OpenAI's products (including our APIs).
Read the latest Model Spec at model-spec.openai.com, and explore previous updates and related blog posts in the changelog. Learn more about the Spec's purpose and development in Inside our approach to the Model Spec.
This repository contains the Markdown source for the Model Spec, together with an archive of released Model Spec HTML versions (starting from the second release on 2025-02-12).
The Model Spec is dedicated to the public domain and marked with the Creative Commons CC0 1.0 deed.