Inside our approach to the Model Spec

Source: OpenAI Date: 2026-03-25 URL: https://openai.com/index/our-approach-to-the-model-spec

Summary

Title-only: A post describing OpenAI’s approach to developing their model spec — the document that defines the values, behaviors, and priorities their models should exhibit. March 2026 is shortly before OpenAI’s “Our Principles” post (April 2026), suggesting a period of public transparency about how OpenAI defines its models’ values and behavioral guidelines. This is the process description that explains how the model spec is created, updated, and enforced.

Implications

The model values thread. OpenAI’s model spec is the normative document that defines what their AI systems are supposed to do when there’s no explicit instruction — the AI’s “character.” Publishing a post about their approach to this document is OpenAI being transparent about a critical and previously opaque part of their product. Anthropic’s Constitutional AI and “character” posts are the analogous transparency moves for comparable documents.

Governance and accountability. How a model spec is developed — who contributes, what values are prioritized, whose input is sought — is fundamentally a governance question. OpenAI describing their approach is an accountability move that lets external observers evaluate whether the process is robust, diverse, and aligned with stated values. The spec and its development process will be scrutinized by AI safety researchers, ethicists, and regulators for evidence of value alignment or its absence.