OutputMessageItemPhaseUnion - TypeScript SDK

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.

Supported Types

models.OutputMessageItemPhaseCommentary

1
const value: models.OutputMessageItemPhaseCommentary = "commentary";

models.OutputMessageItemPhaseFinalAnswer

1
const value: models.OutputMessageItemPhaseFinalAnswer = "final_answer";

any

1
const value: any = "<value>";