> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-5b6e02fd.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# OutputMessageItem - Go SDK

> OutputMessageItem type definition

<Warning>
  The Go SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/go-sdk/issues).
</Warning>

An output message item

## Fields

| Field     | Type                                                                                                                                           | Required             | Description                                                                                                                                                                                                                                                                                                                            |
| --------- | ---------------------------------------------------------------------------------------------------------------------------------------------- | -------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `Content` | \[][components.OutputMessageItemContent](/client-sdks/go/api-reference/models/outputmessageitemcontent)                                        | :heavy\_check\_mark: | N/A                                                                                                                                                                                                                                                                                                                                    |
| `ID`      | `string`                                                                                                                                       | :heavy\_check\_mark: | N/A                                                                                                                                                                                                                                                                                                                                    |
| `Phase`   | optionalnullable.OptionalNullable\[[components.OutputMessageItemPhaseUnion](/client-sdks/go/api-reference/models/outputmessageitemphaseunion)] | :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.OutputMessageItemRole](/client-sdks/go/api-reference/models/outputmessageitemrole)                                                 | :heavy\_check\_mark: | N/A                                                                                                                                                                                                                                                                                                                                    |
| `Status`  | [\*components.OutputMessageItemStatusUnion](/client-sdks/go/api-reference/models/outputmessageitemstatusunion)                                 | :heavy\_minus\_sign: | N/A                                                                                                                                                                                                                                                                                                                                    |
| `Type`    | [components.OutputMessageItemType](/client-sdks/go/api-reference/models/outputmessageitemtype)                                                 | :heavy\_check\_mark: | N/A                                                                                                                                                                                                                                                                                                                                    |