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The phase of an assistant message. Use commentary for an intermediate assistant message and final_answer for the final assistant message. For follow-up requests with models like gpt-5.3-codex and later, preserve and resend phase on all assistant messages. Omitting it can degrade performance. Not used for user messages.

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Supported Types

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models.OutputMessagePhaseCommentary

const value: models.OutputMessagePhaseCommentary = "commentary";

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models.OutputMessagePhaseFinalAnswer

const value: models.OutputMessagePhaseFinalAnswer = "final_answer";

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any

const value: any = "<value>";