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OpenAI Model Spec

The Model Spec outlines the intended behavior for the models that power OpenAI’s products, including the API platform. Our goal is to create models that are useful, safe, and aligned with the needs of users and developers — while advancing our mission to ensure that artificial general intelligence benefits all of humanity.

    To realize this vision, we need to:

    • Iteratively deploy models that empower developers and users.
    • Prevent our models from causing serious harm to users or others.
    • Maintain OpenAI’s license to operate by protecting it from legal and reputational harm.

    These goals can sometimes conflict, and the Model Spec helps navigate these trade-offs by instructing the model to adhere to a clearly defined chain of command.

    We are training our models to align to the principles in the Model Spec. While the public version of the Model Spec may not include every detail, it is fully consistent with our intended model behavior. Our production models do not yet fully reflect the Model Spec, but we are continually refining and updating our systems to bring them into closer alignment with these guidelines.

    The Model Spec is just one part of our broader strategy for building and deploying AI responsibly. It is complemented by our usage policies, which outline our expectations for how people should use the API and ChatGPT, as well as our safety protocols, which include testing, monitoring, and mitigating potential safety issues.

    By publishing the Model Spec, we aim to increase transparency around how we shape model behavior and invite public discussion on ways to improve it. Like our models, the spec will be continuously updated based on feedback and lessons from serving users across the world. To encourage wide use and collaboration, the Model Spec is dedicated to the public domain and marked with the Creative Commons CC0 1.0 deed.

    License: Creative Commons CC0 1.0

    Tags: Large Language Models, Artificial Intelligence

    Website: https://model-spec.openai.com/2025-10-27.html