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Safety, Ethics & Governance · beginner · concept 271 of 311 · Updated Nov 4, 2026

Model Specs and Behavior Policies

Public documents that say how a model should behave: what it refuses, whose instructions win in a conflict, and what defaults it keeps. OpenAI's Model Spec, first published in May 2024 and placed in the public domain under CC0, defines a chain of command from Root and System down to Developer, User and Guideline. Anthropic's constitution states the values Claude is trained toward; both labs pair these with usage policies that bind customers.

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Key terms

Model SpecChain of commandConstitutionUsage policyDefault behaviorsRefusals

Where you meet it in the real world

Judging whether a refusal was intended or a bug, writing system prompts that stay inside policy, product and legal review of AI features, public accountability for lab decisions