> ## Documentation Index > Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-7021d5f4.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # OutputMessage - Go SDK > OutputMessage type definition The Go SDK and docs are currently in beta. Report issues on [GitHub](https://github.com/OpenRouterTeam/go-sdk/issues). ## Fields | Field | Type | Required | Description | | --------- | -------------------------------------------------------------------------------------------------------------------------------------- | -------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `Content` | \[][components.OutputMessageContent](/client-sdks/go/api-reference/models/outputmessagecontent) | :heavy\_check\_mark: | N/A | | `ID` | `string` | :heavy\_check\_mark: | N/A | | `Phase` | optionalnullable.OptionalNullable\[[components.OutputMessagePhaseUnion](/client-sdks/go/api-reference/models/outputmessagephaseunion)] | :heavy\_minus\_sign: | 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. | | `Role` | [components.OutputMessageRole](/client-sdks/go/api-reference/models/outputmessagerole) | :heavy\_check\_mark: | N/A | | `Status` | [\*components.OutputMessageStatusUnion](/client-sdks/go/api-reference/models/outputmessagestatusunion) | :heavy\_minus\_sign: | N/A | | `Type` | [components.OutputMessageType](/client-sdks/go/api-reference/models/outputmessagetype) | :heavy\_check\_mark: | N/A |