MessagePhase Enum
Definition
Important
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Labels an assistant message as intermediate commentary (commentary) or the final answer (final_answer).
For models like gpt-5.3-codex and beyond, when sending follow-up requests, preserve and resend
phase on all assistant messages — dropping it can degrade performance. Not used for user messages.
public enum MessagePhasetype MessagePhase = Public Enum MessagePhase- Inheritance
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MessagePhase
Fields
| Name | Value | Description |
|---|---|---|
| Commentary | 0 | Commentary. |
| FinalAnswer | 1 | FinalAnswer. |
