Updating the OpenAI Model Spec

Updated the Model Spec to better reflect how OpenAI's systems are evolving, focusing on strengthening clarity and guardrails as models move beyond chat into more agentic use cases.

Updated authority levels - The top authority level has been renamed from Platform to Root and elevated above System, making clear which parts of the Model Spec cannot be overridden in any conversation. New authority order: Root → System → Developer → User → Guideline.

Agentic principles - Added principles for agents that can take actions in the world: (1) Act within an agreed-upon scope of autonomy, and (2) Control and communicate side effects.

Other notable changes - Improvements to the Chain of Command with a new No other objectives section; expanded context on OpenAI's goals for safe model behavior in the Overview; expanded principles and examples for default model personality; clarified language around system and developer message confidentiality; and updated refusal style to safe completion for more helpful and transparent model responses around safety boundaries.